Roasted Butternut Squash Soup

I made roasted butternut squash soup last Tuesday and honestly it turned out better than I expected. The yogurt thing scared me because I’d ruined it before by letting it boil, but keeping the heat low actually works. It’s one of those soups that smells like fall without trying too hard.

Why You’ll Love This Recipe

• The squash roasts at 375°F for 30-35 minutes and gets these caramelized edges that taste almost sweet
• Apple butter does more work than you’d think, adding this depth without making it taste like dessert
• No heavy cream means you can eat a full bowl and not feel like you need a nap after
• The yogurt adds tang but only if you don’t boil it, which I learned the hard way twice before
• Marjoram and thyme give it this herbal thing that’s not overpowering but you’d miss it if it wasn’t there
• Takes an hour start to finish and most of that is just waiting for the oven

The Story Behind This Recipe

I kept buying butternut squash at the store and then letting it sit on my counter for two weeks until it got weird. So I needed a recipe that actually made me want to use it. I’d tried other versions that used cream and they were fine but too heavy, and one time I tried to lighten it with milk and it just tasted watery. This one uses yogurt which I always have anyway, and the apple butter was just sitting in my fridge from when my aunt visited in October. The roasted squash soup came together on a Tuesday after work when I finally had the energy to turn the oven on. Now it’s the thing I make when I remember I have squash before it goes bad.

What You Need

You need one butternut squash that’s already peeled and cubed, and you’ll season it lightly with salt and pepper before it goes in the oven. I buy the pre-cut stuff from Trader Joe’s sometimes because peeling butternut squash is annoying and I don’t always have the energy for it after work.

Olive oil for sautéing the onion, which should be chopped into whatever size you normally do for soup. One onion is enough. You’ll also need garlic and I use about 3 cloves minced, maybe 4 if they’re small, but the recipe just says minced garlic so use what feels right.

Apple butter is the thing that makes this different from other butternut squash recipes I’ve tried. It adds this round sweetness without sugar and it’s not like you taste apple exactly, more like it fills in the background. If you skip it the soup will taste flat, I tried that once by accident when I ran out.

You’ll need apple juice too, not cider, just regular apple juice. Then vegetable broth, and I use the boxed kind because bouillon cubes make it taste too salty for this. Yogurt is what replaces cream here and it has to be plain, full-fat works best but I’ve used low-fat and it’s fine.

For spices you need cinnamon, marjoram, thyme, nutmeg, plus more salt and pepper to adjust at the end. The marjoram and thyme are what keep it from tasting like dessert even with the apple butter and cinnamon in there.

How to Make Roasted Butternut Squash Soup

Turn your oven to 375°F and let it heat up while you get the squash ready. Season the cubed butternut squash with just a little salt and pepper, then spread it out on a rimmed baking sheet in a single layer so the pieces aren’t touching. This matters because if they’re crowded they’ll steam instead of roast.

Roast for 30-35 minutes until a fork goes through easily and the edges start to caramelize. You’ll smell this toasted sweetness coming from the oven and if you listen close there’s a subtle crackling sound when it’s getting those brown bits. That’s when you know it’s done.

While the squash is roasting, heat some olive oil in a large Dutch oven over medium-high heat. Add your chopped onion and minced garlic, then sauté for about 5 minutes. The onions should get soft and translucent and the garlic will smell really good but don’t let it brown or it’ll taste bitter.

When the squash comes out of the oven, scrape it all into the pot with the onions. Then stir in the apple butter, apple juice, vegetable broth, yogurt, cinnamon, marjoram, thyme, nutmeg and more salt and pepper. Everything just goes in at once and it looks kind of lumpy and weird at first.

Grab an immersion blender and puree the whole thing until it’s silky but not completely smooth, you still want some body to it. If you don’t have an immersion blender you can do it in batches in a regular blender but be careful because hot liquid expands. I learned that the loud way once.

Now here’s the part that matters most — keep the heat on low and let it simmer gently. Don’t let it boil. If it boils the yogurt will separate and you’ll get these grainy curds floating around that look gross and taste worse. You want to see steam rising gradually and the soup should thicken just a bit as it sits there, but no bubbles breaking the surface hard.

The whole thing from the pot going on the stove to ladling it into bowls takes maybe 15 minutes after the squash is done. When you serve it the aroma should be warm spices first, then the roasted squash underneath, with just a hint of that yogurt tang coming through at the end.

What I Did Wrong the First Time

First time I made this I thought medium heat was fine for the final simmer because I wanted it done faster. The yogurt broke within two minutes and I had these little white chunks floating everywhere that wouldn’t blend back in no matter how much I tried.

It looked like someone dumped cottage cheese into my roasted squash soup and I almost threw the whole pot out. I ended up eating it anyway because I was hungry and it tasted okay but the texture was completely wrong. Now I set a timer and keep it on the lowest setting my stove has, and I’ve never had it happen again.

Roasted Butternut Squash Soup

By Emma

Prep:

10 min

Cook:

50 min

Total:

60 min

Servings:

4 servings

Ingredients

• butternut squash, seasoned lightly with salt and pepper
• olive oil
• onion, chopped
• garlic, minced
• apple butter
• apple juice
• vegetable broth
• yogurt
• cinnamon
• marjoram
• thyme
• nutmeg
• salt
• pepper

Method

1. 1 Preheat oven to 375°F. Lightly season butternut squash with salt and pepper. Spread in a single layer on a rimmed baking sheet. Roast 30-35 minutes until fork tender and edges begin to caramelize, a subtle crackling sound and sweet aroma emerge.
2. 2 While squash roasts, heat olive oil in a large Dutch oven over medium-high. Add chopped onion and minced garlic; sauté about 5 minutes until onions soften, become translucent, and garlic releases a fragrant scent without browning.
3. 3 Once squash finishes roasting, transfer it to the pot. Stir in apple butter, apple juice, vegetable broth, yogurt, cinnamon, marjoram, thyme, nutmeg, salt, and pepper. Use an immersion blender to puree until silky but still retaining body.
4. 4 Maintain a gentle simmer over low heat. Resist the urge to boil—too hot and the yogurt will separate, ruining texture. You’ll know it’s right when steam rises gradually and the soup thickens subtly.
5. 5 Ladle soup into bowls. Garnish as desired. The final aroma should carry warm spices with the softness of roasted squash and a hint of tang from yogurt.

Nutritional information

Calories

160

Protein

4g

Carbs

26g

Fat

5g

Print Recipe Save to Pinterest

Tips for the Best Roasted Butternut Squash Soup

Don’t skip the single layer step when you’re roasting the butternut squash. I tried cramming it all on one pan once and half the pieces steamed while the other half burned.

When you’re stirring everything together after the squash comes out, the apple butter doesn’t mix in right away and you’ll see these dark streaks in the pot. That’s normal. The immersion blender takes care of it.

Your yogurt temperature matters before it even goes in the pot. If you just pulled it from the fridge it’ll cool the soup down too much and then you have to heat it longer which risks curdling. I leave mine on the counter while the squash roasts.

The soup thickens as it sits in the fridge overnight and sometimes I add a splash of broth when I reheat it. Not much, maybe a quarter cup.

Listen for that crackling sound when the squash is in the oven around the 30 minute mark. It’s quiet but once you hear it you know the edges are caramelizing and you’re almost done.

Serving Ideas

I eat this with sourdough bread torn into chunks, not sliced, because the irregular edges soak up the soup better. Sometimes I’ll toast pecans in a dry pan for two minutes and throw a few on top for crunch.

It’s really good cold the next day straight from the fridge if you’re the kind of person who eats leftover pizza cold. The flavors are more distinct when it’s not hot.

A drizzle of olive oil on top right before serving adds this richness the yogurt base doesn’t quite give you on its own.

Variations

You can swap the apple butter for pumpkin butter and it still works, just tastes more earthy and less sweet. I did this when my aunt didn’t bring any last time she visited.

Coconut milk instead of yogurt turns it into something completely different but good if you’re avoiding dairy. Use the full-fat kind from a can and it won’t curdle like yogurt does.

Adding a diced sweet potato with the squash before roasting makes it thicker and a little more filling. You don’t need to change any other amounts.

Sage instead of marjoram and thyme gives it that Thanksgiving stuffing vibe which might be too much depending on what you’re going for. I tried it once in November and it was fine but I prefer the original.

FAQ

Can I use frozen butternut squash instead of fresh? Yeah but roast it from frozen and add 10 extra minutes. It won’t caramelize as well because of the moisture but it still works when you’re lazy.

What if I don’t have apple butter? You could use applesauce with a little maple syrup but it’s not the same depth. The roasted squash soup will taste flatter and you’ll need to adjust the seasoning more at the end.

How do I know if my yogurt curdled? You’ll see little white grainy bits floating that look like cottage cheese curds. If that happens there’s no fixing it, you just have to eat textured soup or start over.

Can I make this without an immersion blender? Use a regular blender in batches and only fill it halfway because hot liquid expands. Leave the lid vent open and cover it with a towel so steam can escape.

How long does this keep in the fridge? Four days in an airtight container. After that it starts tasting like the plastic and the spices get muddy.

Can I freeze roasted butternut squash soup? Yogurt doesn’t freeze well so the texture gets weird when you thaw it. If you want to freeze it use coconut milk or cream instead.

What size butternut squash do I need? One medium squash gives you about 4 cups cubed which is what the recipe needs. If you’re buying pre-cut just get a pound and a half.

My soup is too thick, what do I do? Add vegetable broth a quarter cup at a time and stir it in while it’s still warm. Don’t add water or it’ll taste diluted.

Can I skip the apple juice? You could use more vegetable broth but you lose some of that background sweetness that balances the yogurt tang. I wouldn’t skip it.

What’s the difference between marjoram and oregano? Marjoram is softer and sweeter, oregano is more aggressive and tastes like pizza. Don’t substitute oregano here or it’ll taste Italian instead of fall-ish.

Do I have to peel the squash if I’m blending it anyway? Yes because the skin doesn’t break down even with an immersion blender and you’ll get chewy bits. I tried it once thinking I’d save time and regretted it.

Can I double this recipe? Use two baking sheets for the squash so they’re still in a single layer. Everything else doubles fine but you might need a bigger pot.

Why does my soup taste bland? You probably didn’t add enough salt at the end. Vegetable broth varies in saltiness so you have to taste it before serving and adjust.

Can I use Greek yogurt instead of regular? Yeah but thin it with a little milk first because it’s thicker. Otherwise your soup will be more like a puree than soup.

What if I accidentally let it boil? Turn the heat off immediately and hope for the best. Sometimes if you catch it fast the yogurt won’t separate but usually it’s too late.

How do I reheat leftovers without curdling the yogurt? Low heat on the stove and stir it often. Microwave works too if you do 30 second intervals and stir between each one.

Can I add chicken to make it more filling? Shredded rotisserie chicken stirred in at the end works but then it’s not really butternut squash soup anymore, it’s chicken soup with squash in it.

What does it mean when the recipe says fork tender? A fork slides through the squash pieces without any resistance. If you have to push hard it needs more time in the oven.

My squash didn’t caramelize, what happened? Either your oven runs cool or the pieces were touching each other on the pan. Spread them out more next time and maybe bump the temp to 400°F.

Can I use red onion instead of yellow? Sure but it’ll taste a little sharper and the color might look weird mixed with the orange squash. I stick with yellow.

Does the type of apple juice matter? Not really, just don’t use the kind with added sugar or concentrate. Regular apple juice from a jug is fine and that’s what I use.