Chocolate-Peanut Butter Truffle Bars

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

Rich bars with a dense peanut butter center coated in smooth milk chocolate, perfect for indulgent snacking. This american-inspired desserts ready in about 20 minutes layers creamy peanut butter, unsalted butter, softened, powdered sugar into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 250 calories and feeds 16, so it slots into a weekend bake or a special-occasion dessert tray. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 15 min Cook: 5 min Serves 16 American cuisine 250 cal/serving
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Ingredients

Instructions

  1. Step 1: In a large bowl, mix 1 cup creamy peanut butter with 1/2 cup softened unsalted butter until smooth and creamy using a hand mixer.
  2. Step 2: Gradually add 2 cups powdered sugar and 1 tsp vanilla extract, mixing on low speed until a thick dough forms.
  3. Step 3: Press the peanut butter mixture evenly into a parchment-lined 9x9 inch baking pan. Chill in the refrigerator for at least 1 hour to firm up.
  4. Step 4: In a microwave-safe bowl, combine 2 cups milk chocolate chips and 2 tbsp vegetable oil. Microwave in 30-second intervals, stirring after each, until smooth and glossy.
  5. Step 5: Pour the melted chocolate over the chilled peanut butter layer, spreading evenly with a spatula.
  6. Step 6: Refrigerate bars for another 2 hours or until the chocolate is fully set. Cut into 16 squares and serve chilled.

Equipment for this recipe

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Frequently asked questions

How long does Chocolate-Peanut Butter Truffle Bars take to make?

Total time is about 20 minutes (15 min prep + 5 min cook). Most home bakers find this fits a weekend afternoon; chill or store as the recipe directs before serving.

How do I store leftover Chocolate-Peanut Butter Truffle Bars?

Cool fully before storing. Most baked desserts keep at room temperature in an airtight container for 2–3 days, or in the fridge for up to 5 days. Cream- or custard-based desserts must go in the fridge within 2 hours; reheat gently or serve cold per the recipe.

Can I substitute ingredients in Chocolate-Peanut Butter Truffle Bars?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Chocolate-Peanut Butter Truffle Bars for a different number of people?

The recipe is written for 16 servings. Multiply each ingredient by (your serving target / 16). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Chocolate-Peanut Butter Truffle Bars?

American desserts like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.