gluten free oreo cookie recipe with neopolitan filling

Ingredients

• 6 ounces butter, room temperature
• 7 1/2 ounces sugar
• 3 ounces brown sugar
• 1 Tbsp Kosher Salt (if not using Kosher or flake sea salt, cut this back a bit)
• 3/4 tsp baking powder
• 1/2 tsp baking soda
• 2 tsp instant coffee powder
• 1 Tbsp Gluten Free vanilla extract
• 5 egg yolks
• 8 ounces rice flour, sifted
• 6 ounces cocoa powder, sifted
• cocoa for rolling out the dough
• a few teaspoons of hot water or coffee
• 6 ounces butter or shortening
• 10 ounces powdered sugar, sifted
• 1/4 tsp salt