Rum Apple Tart with Salted Caramel


By Emma
Certified Culinary Professional
Ingredients
- 2 Crispin apples peeled and chopped into rough 1 cm cubes
- 50 ml (3 1/3 tbsp) dark spiced rum
- 280 ml (1 1/8 cups) all-purpose flour
- 6 ml (1 1/4 tsp) baking powder
- 2 large eggs
- 55 ml (3 1/2 tbsp) coconut sugar
- 35 ml (2 1/3 tbsp) melted coconut oil
- 60 ml (1/4 cup) whole milk
- 50 ml (3 1/3 tbsp) coconut sugar (for syrup)
- 45 ml (3 tbsp) unsalted butter
- 130 ml (1/2 cup) coarsely chopped walnuts
Salted Caramel Sauce
- 120 ml (1/2 cup) granulated sugar
- 65 ml (1/4 cup plus 1 tbsp) unsalted butter
- 240 ml (1 cup) heavy cream 35%
About the ingredients
Method
Apple Rum Maceration
- Place oven rack in middle position. Preheat oven to 175 °C (350 °F). Line a 20 cm (8 inch) springform pan with parchment on bottom. Lightly grease sides with butter or nonstick spray.
- Combine chopped apples and dark spiced rum in bowl. Stir and let sit 12 minutes, stirring occasionally. Apples should absorb rum slightly but still hold shape. Drain off the rum liquid and reserve separately.
Dry Ingredients & Batter
- In a separate bowl, sift together flour and baking powder. Set aside. In larger bowl, whisk eggs and coconut sugar vigorously until pale, thickened and airy — at least 3 minutes. I use handheld electric mixer; beats by hand need extra elbow grease here.
- Add melted coconut oil, then milk into egg mix, stirring gently to combine. Fold sifted dry ingredients in 3 parts alternately with reserved rum liquid. Don’t overmix; few lumps ok. Texture should be thick but pourable.
- Fold the drained rum-soaked apples gently into batter with spatula. Keep fruit evenly distributed but avoid squashing.
Baking the Cake
- Pour batter into prepared pan, level surface with spatula. Tap pan lightly to remove bubbles.
- Bake 22-27 minutes, start checking at 20. Tester (thin skewer) inserted into center should come out clean or with few moist crumbs, not wet batter. Edges golden and pulling slightly from pan sides. Good poke test: center springs back, not jiggly but not dry.
- Meanwhile, melt reserved rum, coconut sugar, and butter in small saucepan over medium heat until bubbling gently. Once mixture thickens and smells caramelized, but not burned, remove from heat.
- Immediately sprinkle walnuts on cake surface, then drizzle warm syrup evenly over top. Let cake cool 15 minutes in pan before loosening edges and removing ring. Serve warm or at room temp; flavors deepen after resting.
Salted Caramel Sauce
- Spread sugar evenly over bottom of heavy-bottomed saucepan. Heat on medium without stirring; watch sugar melt and form amber liquid, swirl pan gently for even coloring. Avoid crystal formation—if crystals form, add drop water and start again.
- When sugar is deep amber, remove from heat and whisk in butter quickly. Mixture will bubble violently—stand back. Then slowly pour in cream while whisking. Return to low heat and simmer 4-6 minutes until sauce thickens slightly—should coat back of spoon.
- Remove from heat, let cool to lukewarm. Sauce thickens more when chilled; warm gently before serving if too stiff.
- Drizzle sauce generously on slices. Keeps refrigerated up to 1 week; gently reheat or bring to room temp before serving.
Cooking tips
Chef's notes
- 💡 Use Crispin or Honeycrisp apples for firm texture. Cortlands get mushy after maceration. Let fruit soak in rum 10-12 minutes max to keep shape intact but absorb flavor. Draining rum is key; reserved liquid folds back into batter, adding aroma without sogginess.
- 💡 Whisk eggs and coconut sugar vigorously until pale and thick. Electric mixer helps but vigorous hand whisking doable with patience, builds airy batter. Coconut oil melts clear—replace with vegetable oil for neutral taste but loses subtle hint of sweetness. Oil-egg mix must combine gently to avoid deflating eggs.
- 💡 Fold dry ingredients sifted with baking powder in thirds, alternating with reserved rum liquid. Avoid overmixing or batter will toughen. Lumps ok, batter thick but pourable. Gently fold drained apples last; pressure squashes fruit and changes texture. Spread batter evenly in springform pan with parchment for clean unmolding.
- 💡 Watch baking cues not timer: edges golden, pulling slightly from pan. Insert thin skewer; moist crumbs okay, never wet batter. Center springs back to touch—not jiggly but not dry. Start checking at 20 minutes, bake up to 27 max. Tap pan lightly before baking to remove air bubbles for even crumb.
- 💡 Caramel sauce demands patience. Melt sugar over medium heat undisturbed; swirl pan gently for even amber color. Avoid crystals; add a drop water and restart if formed. Butter addition causes strong bubbling—stand back. Slowly whisk in cream while hot, low simmer thickens sauce. Cool to lukewarm thickens further; reheat gently to serve.
Common questions
Can I use other apples?
Yes but text changes. Crispin or Honeycrisp hold shape well for maceration. Cortlands soggy, fall apart. Adjust maceration time accordingly. Firmer apples help maintain texture despite soaking in rum.
What if no coconut sugar?
Brown sugar swaps fine but adds moisture. Twice stirred for proper dissolution. Coconut sugar darkens flavor slightly. If using white sugar, may lose complexity. Consider adding a pinch cinnamon to compensate flavor loss.
How to fix grainy caramel?
Usually high heat or stirring early causes crystals. Restart helps. Avoid stirring sugar till fully dissolved. Gentle tilting of pan ok. If caramel breaks, small butter addition or extra cream smoothes but texture shifts slightly. Practice patience first.
Storage tips for tart and sauce?
Tart keeps room temp few hours, refrigerate longer. Reheat gently to soften. Sauce stores sealed fridge up to week; thickens on chill. Warm gently before use; no sudden heat or boils or sauce breaks. Freeze not recommended; texture suffers.