If you’re craving classic brownies, it’s easy to transform Martha White’s delectable brownie bite mix into traditional bar shaped treats—but why stop there? With just a couple of extra ingredients and add-ons, dozens more decadent desserts can be made at your fingertips. Here’s a foolproof recipe for the basic version—plus the scoop on a few of our favorite twists:

Basic Brownies

2 (7.4 oz) packages Martha White Brownie Bites mix
2 large eggs
¼ cup plus 2 tablespoons vegetable oil

Heat oven to 350°F. Spray a 8×8″ baking pan with nonstick baking spray. In a medium bowl, stir together Martha White Brownie Bites mix, eggs, and oil, mixing until just combined. Spread batter into prepared pan. Bake until set and shiny on top, about 25 to 30 minutes. Let cool at least 20 minutes before slicing.

PB & Berry Brownies

Prepare the batter for Basic Brownies. Stir in ¼ cup peanut butter chips and ⅓ cup fresh or frozen strawberries. Spread batter in pan and bake as directed. Let cool at least 20 minutes before slicing.

German Chocolate Brownies

Prepare the batter for Basic Brownies. In a small bowl, stir together 1 cup sweetened shredded coconut, 1/2 cup chopped pecans, 2 tablespoons corn syrup, and 2 tablespoons softened butter. Spread brownie batter in pan and top with spoonfuls of the coconut mixture. Bake as directed. Let cool at least 20 minutes before slicing.

Cookies and Cream Brownies

Prepare the batter for Basic Brownies. Stir in ¼ cup white chocolate chips and ½ cup crushed creme-filled sandwich cookies. Spread batter in pan and bake as directed. Let cool at least 20 minutes before slicing.

Kitchen Sink Brownies

Prepare the batter for Basic Brownies. Stir in ¼ cup crushed pretzels and 2 tablespoons raisins and 2 tablespoons M&M candies. Spread batter in pan and bake as directed. Let cool at least 20 minutes before slicing.

Peppermint Stick Brownies

Prepare the batter for Basic Brownies. Stir in ¾ teaspoon peppermint extract. Spread batter in pan and top with 3 tablespoons cup crushed candy canes. Bake as directed. Let cool at least 20 minutes before slicing.