Brownie Crinkle Cookies 6 Steps
In a medium bowl, mix together the cocoa powder, white sugar and vegetable oil. Beat in eggs one at a time, until fully incorporated. Mix in the vanilla.
In another bowl, combine the flour, baking powder and salt. Stir the dry ingredients into the wet mixture just until a dough forms (do not over beat). Cover bowl with plastic wrap and refrigerate for at least 4 hours or overnight.
When ready to bake, preheat oven to 350°F (175°C). Line two baking trays with parchment paper. Roll 1 tablespoon full of dough into balls for smaller cookies, or 2 tablespoons full for larger cookies.
Add the icing sugar to a smaller bowl. Generously and evenly coat each ball of dough in sugar and place onto prepared cookie sheets.
Bake in oven for 10 minutes (for small cookies) or 12 minutes (for larger cookies). The cookies will come out soft from the oven but will harden up as they cool.
Allow to cool on the cookie sheet for 5 minutes before transferring to wire racks to cool.