Grind the first 3 ingredients together to a fine powder.
Mix the grounded powder with the butter until light and fluffy.
Slowly incorporate the yolks, then the baking powder and flour.
Press into a parchment lined baking tray.
Bake at 325°F (163°C) until golden brown.
When the crust is ready and cooled, mix all ingredients until incorporated except or the Chocolate Chips 60%.
Pour the mixture onto th tray and sprinkle chips on top. Bake at 325°F (163°C).