Preheat oven to 350 degrees F. Unwrap and chop the
3 MUSKETEERS® Brand FUN SIZE®.
Measure 1 cup of chopped candy; set aside.
Combine the flour, baking powder and baking soda in a bowl; set aside.
Combine the butter and sugar in a bowl, then beat with an electric mixer on medium speed until light and soft, about 5 minutes.
Beat the eggs into the batter, one at time, until smooth.
Decrease the mixer speed to low, and beat in 1/3 of the flour mixture, followed by 1/2 of the sour cream. Stop and scrape again.
Beat in the remaining flour mixture and sour cream.
Fold in the chopped 3 MUSKETEERS® Brand FUN SIZE®, reserving the 1 cup of chopped candy for the crumb topping.
Give the batter a final mix with a large spatula. Set aside.
To make the crumb topping, stir the ingredients with a mixer until evenly blended.
Be sure to include the 1-cup of chopped 3 MUSKETEERS® reserved from Step 1.
Pour the cake batter into a greased 9 x 13-inch pan. Crumble the topping in an even layer over the entire surface of the batter.
Bake for 50-55 minutes.
Remove from the oven, transfer to a wire rack, and let cool completely.
Cut into 2-inch squares (4 lines x 6 lines), and sprinkle a little bit of confectioner's sugar on top.
®/™/© Mars, Inc. 2011