In a large bowl, combine brownie ingredients. Blend with a wooden spoon just until combined. Spread in bottom of baking dish.
For the cookies, beat softened butter with sugar and vanilla until blended. Add egg and combine. Add flour, baking powder and salt and mix until fully combined. Fold in sprinkles.
Drop by spoonful over brownie layer, trying to keep the cookie layer evenly spread.
Bake in a 375 degree preheated oven for 25-28 minutes. Remove and cool completely. Cut and enjoy.
Store in airtight container at room temperature up to 5 days.
Notes
Always line the bottom of your pan with parchment paper. Once cooled, you can use the paper to lift the uncut bars straight out of the pan before slicing.
Cut the bars as big or as small as you like. I like to cut mine into BIG squares!
To make “brookie bites”, cut them into 1-2 inch squares. Ideal when you need to stretch them to feed a crowd!
Change up the sprinkle colors for different holidays. Use red and green for Christmas, orange for Halloween, green for St. Patty’s day etc.