Pre heat oven to 350 and spray a 9in heart shaped baking pan with pam
baking spray
Using a standing mixer, beat the butter and sugars until creamy and smooth
Beat in the egg and vanilla until combined
In a medium bowl, whisk together flour, cornstarch, baking soda, and
salt until combined
Gradually beat in dry ingredients until combined
Fold in the chocolate chips, chocolate chunks and M&Ms
Press batter into the heart pan
Sprinkle the pink and white heart sprinkles on top
Bake in preheated oven for 20-22 minutes or until lightly browned on the sides
Remove from oven and allow to cool completely