Sheet Pan Brownie Cookie Bar with Chocolate Chunks

By AislePrompt Editorial · Published 2026-06-02 · Updated 2026-06-02

A decadent dessert that combines chewy brownies and soft chocolate chip cookies baked together on one pan for an easy crowd-pleaser. This American-inspired recipe, ready in about 55 minutes, layers unsalted butter, granulated sugar, 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 360 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.

Ingredients

• 1 cup, melted unsalted butter
• 1 1/4 cups granulated sugar
• 3/4 cup, packed brown sugar
• 2 large eggs
• 2 tsp vanilla extract
• 1 1/4 cups all-purpose flour
• 3/4 cup unsweetened cocoa powder
• 1/2 tsp baking powder
• 1/4 tsp salt
• 1 cup semi-sweet chocolate chunks
• 1 1/2 cups all-purpose flour for cookie dough
• 1/2 tsp baking soda
• 1/4 tsp salt for cookie dough
• 1/2 cup, softened unsalted butter for cookie dough
• 1/2 cup granulated sugar for cookie dough
• 1/2 cup, packed brown sugar for cookie dough
• 1 large egg for cookie dough
• 1 tsp vanilla extract for cookie dough
• 1 cup semi-sweet chocolate chips for cookie dough

The bakeware we’d bake this in → Best Bakeware Sets in 2026: Top Picks + Buying Guide

Instructions

1. Step 1: Preheat oven to 350°F and grease a 9x13-inch sheet pan with 1 tbsp unsalted butter.
2. Step 2: In a large bowl, whisk together 1 cup melted unsalted butter, 1 1/4 cups granulated sugar, and 3/4 cup packed brown sugar until combined; add 2 large eggs and 2 tsp vanilla extract, beating until smooth.
3. Step 3: Sift in 1 1/4 cups all-purpose flour, 3/4 cup unsweetened cocoa powder, 1/2 tsp baking powder, and 1/4 tsp salt; fold gently until the brownie batter is uniform, then stir in 1 cup semi-sweet chocolate chunks.
4. Step 4: Spread the brownie batter evenly into the prepared sheet pan.
5. Step 5: In a separate bowl, whisk 1 1/2 cups all-purpose flour, 1/2 tsp baking soda, and 1/4 tsp salt for the cookie dough.
6. Step 6: Using an electric mixer, cream together 1/2 cup softened unsalted butter, 1/2 cup granulated sugar, and 1/2 cup packed brown sugar for the cookie dough until light and fluffy.
7. Step 7: Beat in 1 large egg and 1 tsp vanilla extract into the cookie dough, then gradually add the flour mixture, mixing until just combined.
8. Step 8: Fold in 1 cup semi-sweet chocolate chips into the cookie dough, then dollop spoonfuls evenly on top of the brownie batter, gently spreading to cover most of the surface.
9. Step 9: Bake the sheet pan for 30-35 minutes until the cookie topping is golden and a toothpick inserted into the brownie layer comes out with moist crumbs.
10. Step 10: Cool completely in the pan on a wire rack before slicing into bars and serving.