01 -
Preheat oven to 350°F and lightly grease three 12-cup mini muffin pans.
02 -
In a large mixing bowl, combine Devil's Food cake mix, eggs, canola oil, and black food coloring if desired; mix until fully incorporated.
03 -
Scoop approximately 1/2 tablespoon of dough into each muffin cup and flatten the surface lightly with fingertips.
04 -
Bake for 8 to 10 minutes or until edges are set. Remove from oven and press a tablespoon measuring spoon into each cookie to form an indentation. Allow to cool completely in pans.
05 -
In a medium mixing bowl, beat the softened butter until creamy. Gradually incorporate powdered sugar, vanilla extract, and salt. Add milk incrementally and continue mixing until the frosting is smooth and suitable for piping. Tint with green food coloring to desired shade.
06 -
Pipe buttercream into each cooled cookie cup, filling the cavity to resemble bubbling potion.
07 -
Top each cookie with green sprinkles, Halloween sprinkles, and candy eyeballs. Break pretzel sticks in half and insert one half into each cookie as a stir stick.
08 -
Arrange cookies on a platter and serve.