STEP 1

In a bowl, whisk together the flour, baking powder, baking soda, and salt.

STEP 2

In a bowl, cream butter, brown sugar, and white sugar. Add the eggs, one at a time. Mix in vanilla.

STEP 3

 Gradually add in the flour mixture. Fold in the M&Ms, white chocolate chips, and sprinkles

STEP 4

Press the dough into the pan. Top with additional M&Ms, white chocolate chips, and sprinkles.

STEP 5

Bake for 22-28 mins.  Move to a wire rack to cool before slicing!