Quince Paste Chocolate Bars

Name: Quince Paste Chocolate Bars
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Yield: 24 servings
Cuisine: Mediterranean
Ingredients: 6 oz (170 g) unsalted butter, cold; ⅓ cup (70 g) granulated sugar; 1 (18 g) large egg yolk, at room temperature; ¾ cup (90 g) all-purpose flour; ¼ cup (25 g) unsweetened cocoa powder; ¼ tsp (1 g) kosher salt; 8 oz (225 g) quince paste (membrillo); 4 oz (115 g) dark chocolate (60% cocoa), finely chopped, finely chopped; ¼ cup (60 ml) heavy cream; 1 tbsp (14 g) unsalted butter

From the MyKitchenBank Kitchen

Three layers of chocolate and fruit sophistication in every bite: a tender dark chocolate base, a layer of sweet and tart quince paste, and a silky chocolate ganache topping. These elegant bars showcase membrillo, the beloved Latin American fruit paste, paired with rich chocolate for a refined treat that tastes far more complicated than it is to make. Perfect for entertaining, gift-giving, or simply indulging with a strong cup of coffee.

Prep: 20 min
Cook: 30 min
Wait: 50 min
Total: 1 hr 40 min
Makes: 24 bars (one 9×13-inch pan)

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Steps

Before you start

Preheat the oven to 350°F (175°C) at least 15 minutes before baking to ensure even heat throughout.
Line the 9×13-inch pan with parchment paper, leaving a 2-inch overhang on two opposite sides for easy bar removal after cooling.
Have butter for the base cold from the refrigerator, and all other ingredients at room temperature.
If using quince paste from a can, have a warm, damp spatula or offset knife on hand to help spread it smoothly over the base.

1
Preheat oven and prepare panOven 350°F / 175°C
- Preheat oven to 350°F (175°C).
- Line a 9×13-inch (23×33 cm) baking pan with parchment paper, leaving overhang on two opposite sides for easy removal.
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Ready when: Oven reaches 350°F and is ready to bake
Tip: Use the parchment overhang to lift the cooled bars from the pan for easy removal.
2
Make chocolate base dough
- In a medium bowl, cream cold butter and sugar together with a hand mixer or whisk for 2–3 minutes until the mixture resembles coarse sand with some small butter lumps still visible.
- Stir in the egg yolk until just combined.
- In a separate small bowl, whisk together flour, cocoa powder, and salt.
- Fold the dry ingredients into the wet ingredients until just combined; do not overmix.
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Ready when: Dough comes together and is no longer visibly crumbly
Tip: Don't overwork the dough—stop as soon as dry ingredients are incorporated, or the base will be tough rather than tender.
3
Press base into pan
- Transfer the chocolate dough to the prepared pan and press it firmly and evenly across the bottom in a single, compact layer, about 1/4 inch thick.
- Use the bottom of a measuring cup or your fingers to ensure no gaps and that it reaches all edges.
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Ready when: Base is even, compact, and fills the entire pan bottom
Tip: If the dough is sticky, dampen your fingers lightly with cool water to prevent sticking.
4
Pre-bake the chocolate baseOven 350°F / 175°C
- Bake the base at 350°F (175°C) for 12–14 minutes until it is set but still slightly tender to the touch (it will firm up as it cools).
- The edges should pull away slightly from the pan sides.
- Remove from oven and set aside briefly.
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Ready when: Base is set and edges pull away slightly from pan sides
5
Spread quince paste filling
- Allow the baked base to cool for 2 minutes.
- Spread the quince paste evenly over the warm base in a thin, even layer.
- If the quince paste is too firm to spread smoothly, briefly warm it in the microwave (10–15 seconds) or work it gently with a warm, damp spatula until it reaches spreadable consistency.
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Ready when: Quince paste is spread evenly from edge to edge with no bare spots
Tip: Use a warm, damp offset spatula or butter knife to spread the quince paste smoothly without dragging or tearing the chocolate layer beneath.
6
Bake with quince fillingOven 350°F / 175°C
- Return the pan to the oven and bake at 350°F (175°C) for 15–18 minutes.
- The quince paste will warm through and soften slightly, and the base will bake completely.
- You may see the quince paste begin to bubble slightly at the edges—this is normal.
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Ready when: Quince paste is warm throughout and slightly softened; base is fully baked
7
Heat cream and make ganache
- While the bars bake (or immediately after they come out), heat the heavy cream in a small saucepan over medium heat or in a microwave-safe bowl in the microwave until it just begins to steam (about 60 seconds in the microwave; 2–3 minutes on the stovetop).
- Place the chopped dark chocolate and butter in a heatproof bowl.
- Pour the hot cream over the chocolate and butter, let sit for 1 minute to allow the heat to begin melting the chocolate, then whisk or stir until smooth and glossy with no chocolate streaks visible.
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Ready when: Ganache is smooth, glossy, and free of chocolate lumps
Tip: Use finely chopped chocolate, not chips, for smoother, faster melting. If the ganache becomes too thick as it cools, let it sit at room temperature to soften slightly.
8
Pour ganache over bars
- Remove the baked bars from the oven.
- While the quince layer is still warm, carefully pour the ganache over the top.
- Using a warm offset spatula or butter knife, spread it in an even layer, letting it settle gently into the edges and corners.
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Ready when: Ganache is spread evenly and covers the entire surface
9
Cool bars completely
- Allow the bars to cool at room temperature for 30–45 minutes (the ganache will begin to set), then refrigerate for at least 30 minutes (or up to 2 hours) until the ganache is completely firm to the touch.
- This chilling time makes cutting much cleaner.
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Ready when: Ganache is no longer shiny and feels completely firm when pressed gently
10
Cut into bars and serve
- Using a sharp knife, cut the bars into 24 pieces by first cutting 4 columns (cutting lengthwise three times), then 6 rows (cutting widthwise five times) to create even bars approximately 2×3 inches (5×7.5 cm).
- For the cleanest cuts, warm the knife under hot running water and wipe it dry between each cut.
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Ready when: All bars are cut cleanly with sharp edges
Tip: A heated, wiped knife prevents chocolate from cracking or dragging, resulting in neat, professional-looking bars. A serrated bread knife also works well if heated between cuts.

Good to know

Tips

If quince paste is very firm or comes in a solid block, warm it slightly in your hands, under warm running water, or in the microwave (10–15 seconds) to make it spreadable without damaging the chocolate base beneath.
Use a warm, damp knife wiped between cuts for the neatest, cleanest-edged bars—this prevents the chocolate from cracking or dragging. Re-warm the blade every 3–4 cuts for best results.
Pair these bars with strong, bitter beverages like black coffee, espresso, or strong black tea. The tartness of quince balances the richness of chocolate beautifully.
Layer bars in storage with parchment paper between them to prevent the ganache topping from sticking to adjacent bars, especially important if storing in the refrigerator.

Make ahead

Yes—bars can be made up to 3 days ahead. Store covered at room temperature or refrigerated. Bars actually taste slightly better the next day as the flavors meld together. Frozen bars keep for up to 2 months and do not need to be thawed before serving or eating.

Storage & reheating

Room temperature: in an airtight container for up to 3 days (flavors are brightest). Refrigerator: in an airtight container for up to 1 week (ganache stays firmer in cool temps). Freezer: in an airtight container or freezer bag for up to 2 months. Do not thaw frozen bars—they're delicious straight from the freezer and will soften to the perfect texture while you eat them.

Substitutions

dark chocolate (60% cocoa), finely chopped → Semi-sweet or milk chocolate. Milk chocolate will produce a sweeter bar; if using milk chocolate, reduce the sugar in the base by 2 tablespoons for better balance.
heavy cream → Whole milk plus 1 tablespoon melted butter. Creates a slightly less rich ganache but the texture and consistency are very similar. Use the same amount of milk as you would cream.
quince paste (membrillo) → Guava paste or apple paste. Both have similar sweetness and spreadable texture. Guava paste will be slightly more tart; apple paste is milder and more subtle.
unsweetened cocoa powder → Dutch-process (alkalized) cocoa powder. Will be slightly less acidic with a darker color. Use the same amount as you would unsweetened cocoa powder.