These millionaire bars have a perfectly crumbly crust, an ooey gooey caramel middle, and a thin layer of delicious semi-sweet chocolate on top. They definitely earn their name!
Combine flour, baking powder and salt in a small bowl and set aside. In a large bowl, beat butter and sugar with a mixer until light and fluffy. Add in your flour mixture until just incorporated. Spread into an 8 x 8" baking pan lined with parchment paper. Bake at 325 for 15-18 minutes or until lightly golden brown.