These easy brownie bars are the kind of back-pocket dessert busy families love because they use just three store-bought ingredients and come together in one pan with almost no fuss. Layering refrigerated cookie dough, whole chocolate sandwich cookies, and brownie batter makes a rich, crowd-pleasing treat with soft, fudgy, and crunchy-creamy bites all in one square, and it is especially handy when you need something fun for a potluck, bake sale, game night, or weekend treat.
Serve these bars cooled and cut into small squares since they are very rich. A cold glass of milk is the classic pairing, but they are also wonderful with hot coffee, a scoop of vanilla ice cream, or a little whipped cream for dessert. For parties, I like to set them out on a simple tray with fresh strawberries or raspberries to balance the chocolate.
Oven Baked 3-Ingredient Cookie Dough Brownie Bars
Servings: 20 bars
Ingredients
1 package (16 oz) refrigerated chocolate chip cookie dough
24 whole chocolate sandwich cookies
1 box brownie mix, prepared according to box directions
Directions
1. Preheat the oven to 350°F and grease a glass 9x13-inch casserole dish.
2. Press about half of the cookie dough firmly and evenly into the bottom of the prepared dish to make the first layer.
3. Arrange the whole chocolate sandwich cookies over the dough in tight edge-to-edge rows so that each bar will have a full cookie in it.
4. Gently flatten and place the remaining cookie dough over the cookies as evenly as you can, covering most of the tops without shifting the cookies too much.
5. Prepare the brownie batter according to the box directions, then pour and spread it gently over the cookie dough layer.
6. Bake for 35 to 45 minutes, until the edges are set and the center still has just the slightest jiggle.
7. Cool completely, at least 1 hour if possible, before cutting into bars so the layers can set and the pieces hold together nicely.
Variations & Tips
For cleaner slices: Let the bars cool fully before cutting, and for the neatest squares, chill the pan for 20 to 30 minutes after cooling. Wiping the knife between cuts helps keep the brownie layer from dragging.
For picky eaters: Use a plain brownie mix and classic chocolate sandwich cookies for that familiar cookies-and-brownies flavor kids usually go for right away. Keeping the layers simple makes these bars a safe choice for parties and school events.
Pan and baking tip: Because glass pans can bake a little differently, start checking around the 35-minute mark. If the edges are done but the middle still looks very loose, give it a few more minutes, but do not overbake or the bars can turn dry instead of fudgy.
Easy flavor swap: Try peanut butter or double-chocolate cookie dough if your family likes a richer twist. You can also use golden sandwich cookies for a different look and a sweeter vanilla-style center.