3/4 c. butter, softened
1 c. granulated sugar
1 c. firmly packed light brown sugar
3 large eggs
1 tsp. vanilla extract
2 1/2 c. all-purpose flour, divided
2 1/2 tsp. baking powder
1/2 tsp. salt
1/3 c. unsweetened cocoa powder
1 tbsp., butter, melted
1 c. M&M'S® semi-sweet chocolate mini baking bits

Preheat oven to 350°F. Lightly grease 13 x 9 x 2-inch baking pan. Set aside. In a large bowl, cream 3/4 cup butter and sugars until light and fluffy. Beat in eggs and vanilla. In medium bowl, combine 2 1/4 cups flour, baking powder and salt; blend into creamed mixture. Divide batter in half. Blend together cocoa powder and melted butter; stir into 1/2 of the dough. Spread cocoa dough evenly into prepared baking pan. Stir remaining 1/4 cup flour and 1/2 cup M&M'S® semi-sweet chocolate mini baking bits into remaining dough. Spread evenly over cocoa dough in pan. Sprinkle with remaining 1/2 cup M&M'S® semi-sweet chocolate mini baking bits.

Bake 25 to 30 minutes or until edges start to pull away from sides of pan. Cool completely. Cut into bars. Store in tightly covered containers.