Preheat oven to 350º F. Line sheet pan with parchment paper or silicon baking mat. Set aside.
Cream together butter, cocoa and vegetable oil until well-combined. Stir in chocolate chips.
Mix in flour, baking powder, and salt until well-combined. Add eggs, sugar and vanilla and mix until all well-combined and creamy.
Scoop tablespoon of cookie dough and drop onto prepared sheet pan, leaving about 1 1/2 inches between each for the cookies to spread as they bake.
Bake for 10 minutes. Remove from oven and allow to cool completely.
For the Peppermint Cream:
While the chocolate cookie dough is baking, prepare the peppermint cream filling. Cream together all of the ingredients for the cream filling recipe. Set aside until the chocolate cookies portion has completely cooled.
Scoop 1 teaspoon of cream filling and place on top of the flattened side of one chocolate cookies. Place another chocolate cookie on top of the cream filling.