One-Bowl Chocolate Chip Brownie Cookie Bars

By AislePrompt Editorial · ·

How this recipe was made — this recipe was drafted by AislePrompt's AI-assisted pipeline from technique templates and USDA-sourced nutrition data, and published by AislePrompt Editorial — see how AislePrompt recipes are developed and reviewed.

Chewy bars combining the richness of brownies with the chewiness of cookies, loaded with semi-sweet chocolate chips. This American-inspired recipe, ready in about 45 minutes, layers unsalted butter, granulated sugar, light brown 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 320 calories and feeds 12, 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: 30 min Serves 12 American cuisine 320 cal/serving
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Ingredients

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Instructions

  1. Step 1: Preheat oven to 350°F. Line a 9x13-inch baking pan with parchment paper, leaving an overhang for easy removal.
  2. Step 2: In a large microwave-safe bowl, melt 1 cup (2 sticks) unsalted butter in 30-second intervals until fully melted and slightly cooled, about 1-2 minutes.
  3. Step 3: Whisk in 1 1/4 cups granulated sugar and 3/4 cup packed light brown sugar into the melted butter until combined. Add 2 large eggs one at a time, whisking vigorously after each addition until smooth. Stir in 2 teaspoons vanilla extract.
  4. Step 4: Sift together 1 1/3 cups all-purpose flour, 3/4 cup unsweetened cocoa powder, 1/2 teaspoon baking powder, and 1/4 teaspoon salt. Gradually fold the dry ingredients into the wet ingredients until just combined.
  5. Step 5: Fold in 1 1/2 cups semi-sweet chocolate chips evenly through the batter. Pour the batter into the prepared pan and spread into an even layer.
  6. Step 6: Bake for 25-30 minutes until the edges are set and a toothpick inserted in the center comes out with moist crumbs. Cool completely in the pan on a wire rack before cutting into 12 bars.

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