One-Bowl Chocolate Chip Cookie Bars

By AislePrompt Editorial · Published 2026-04-29 · Updated 2026-04-29

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 drafted and published.

Soft and chewy chocolate chip cookie bars made effortlessly in one bowl for an easy, crowd-pleasing dessert. This American-inspired recipe, ready in about 35 minutes, layers unsalted butter, melted, brown sugar, granulated 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 9, 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: 10 min Cook: 25 min Serves 9 American cuisine 250 cal/serving

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Ingredients

1/2 cup unsalted butter, melted
3/4 cup brown sugar
1/4 cup granulated sugar
1 tsp vanilla extract
1 large egg
1 1/2 cups all-purpose flour
1/2 tsp baking soda
1/4 tsp salt
1 cup semi-sweet chocolate chips

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Instructions

Step 1: Preheat your oven to 350°F and line an 8x8-inch baking pan with parchment paper.
Step 2: In a large mixing bowl, whisk together 1/2 cup melted unsalted butter, 3/4 cup brown sugar, and 1/4 cup granulated sugar until smooth.
Step 3: Add 1 tsp vanilla extract and 1 large egg to the bowl. Whisk until fully combined and glossy.
Step 4: Stir in 1 1/2 cups all-purpose flour, 1/2 tsp baking soda, and 1/4 tsp salt until just combined — do not overmix.
Step 5: Fold in 1 cup semi-sweet chocolate chips evenly throughout the dough.
Step 6: Spread the dough evenly into the prepared pan and bake for 22-25 minutes until the edges are golden and a toothpick inserted in the center comes out with a few moist crumbs.
Step 7: Allow to cool completely before slicing into bars.