Preheat oven to 350?F (175?C). Line 2 cookie sheets with parchment paper.

In a medium-sized bowl, mix together the cocoa powder, sugar, melted butter, and vegetable oil. Beat in the egg and vanilla extract until fully incorporated.

Add the flour, baking powder, and salt; stir the dry ingredients first before mixing them into the wet ingredients until a dough forms. Fold in the chocolate chips.

Scoop out 1-2 tablespoonfuls of dough and place them onto the prepared baking sheets. Press them down to your desired thickness.

Bake in the preheated oven for 10-12 minutes. The cookies will be soft from the oven but will harden as they cool. Avoid overbaking.

Allow the cookies to cool on the cookie sheet for 10 minutes before transferring them to wire racks to cool completely.