Double mint chocolate chip ice cream sandwiches

• 2 Eggs, large

• 1/4 tsp Baking powder

• 1/4 tsp Baking soda

• 1/2 cup Bob's red mill tapioca flour

• 1/2 cup Brown sugar, light

• 1/2 cup Dutch-processed cocoa, unsweetened powder

• 1/2 cup Gluten-free oat flour

• 1/4 cup Granulated sugar

• 1/2 tsp Kosher salt

• 1/2 tsp Peppermint extract

• 1/3 cup Sweet rice flour

• 1/2 tsp Vanilla extract, pure

• 1/2 cup White rice flour

• 1/2 tsp Xanthan gum

• 24 Mint chocolate wafers

• 1 tsp Espresso, powder

• 8 tbsp Butter, unsalted

• 1 1/2 qt Mint chocolate chip ice cream