For all variationsline a 9-by-13-inch pan with greased foil. Then prepare your favorite boxed brownie batter, add the mix-ins and bake as directed.
RASPBERRY CHEESECAKE BROWNIES
Mix together 1 tsp almond extract, 4 oz softened cream cheese, 2 tbsp softened butter, ¼ cup sugar, 1 egg and 2 tbsp all-purpose flour. Stir ½ cup raspberries into cream cheese mixture. Pour batter in pan and dot with cream cheese mixture. Top with additional ½ cup raspberries. Get marble effect by drawing a knife through batter; bake until done.
CARAMEL PRETZEL BROWNIES
Mix ½ cup broken pretzels and ½ cup chocolate chips into brownie batter. Pour into prepared pan and scatter surface with an additional 1 cup broken pretzels. Bake until done; allow to cool completely. Melt ½ cup butterscotch chips and transfer to a bag with a snipped corner. Drizzle over brownies.
TROPICAL COCONUT BROWNIES
Mix ½ cup chopped macadamia nuts, ½ cup chopped dried pineapple and 1 tsp rum extract into brownie batter. Pour batter into prepared pan and scatter surface evenly with 1 cup coconut flakes or shredded coconut. Bake until brownies are done and coconut is toasted.
PEANUT BUTTER LAYER BROWNIES
Mix ½ cup chopped peanuts into brownie batter. Pour into prepared pan and bake until done; allow to cool completely. Mix 1 cup peanut butter, 4 tbsp melted unsalted butter, ¾ cup confectioners' sugar and ¼ tsp salt until smooth and spread over brownies. Sprinkle with ½ cup mini chocolate chips.
GINGER SPICE BROWNIES
Mix ½ cup chopped crystallized ginger, 2 tbsp molasses, 1 tsp cinnamon and ½ tsp ground ginger into brownie batter. Pour into prepared pan and bake until done; cool. Mix together ¾ cup confectioners' sugar, ½ tbsp molasses and 2 tsp water and spread over brownies. Allow glaze to set before cutting brownies.
Mix 1 cup broken graham crackers and ½ cup chocolate chips into brownie batter. Pour into prepared pan and bake until done. Top warm brownies with 3 cups mini marshmallows and broil until golden. When cool, cut into squares using a lightly greased knife.
Mix ½ cup chopped Andes mints* into brownie batter. Bake until done and allow to cool completely. Melt ½ cup light green chocolate melts (wilton.com). Use a spoon to drizzle over surface of brownies.
CRUMB COFFEE CAKE BROWNIES
Mix 1 tbsp instant espresso powder and ½ cup chopped walnuts into brownie batter. Pour into prepared pan. Blend together 1 stick softened butter, ½ cup sugar, 1¼ cups all-purpose flour and 1 tsp cinnamon; scatter crumb mixture over brownie batter. Bake until done.
COOKIES AND CREAM BROWNIES
Mix ½ cup white chocolate chips and ½ cup broken Oreos into brownie batter. Pour into prepared pan and sprinkle surface evenly with an additional 1 cup crushed Oreos. Bake until done.