Preheat the oven to 350 °F
Using a pasty brush, coat the donut pan with the oil of your choice
In a large bowl, whisk together cocoa, flour, baking soda, baking powder, salt, and brown sugar until well combined.
⅔ cup cocoa powder, 1¾ cups gluten-free flour, 1¼ cups brown sugar, 1 teaspoon baking powder, 1 teaspoon baking soda, ¾ teaspoon salt
In another bowl, mix your cornstarch and water until smooth. Then whisk in milk, vanilla, and vinegar.
4 tablespoons corn-starch, 6 tablespoons water
Combine all the wet ingredients with the dry ones and add vegetable oil. Then fold in the crushed Oreos (optional) & Mix very well.
2 teaspoons vanilla extract, 1 cup almond milk, 2 teaspoons white vinegar, ½ cup vegetable oil, 3 crushed Oreos
Place your batter in a pastry bag, then fill the donut pan 3/4 of the way full.
Bake for approximately 15 minutes (oven times may vary)
Place donuts on a baking rack and allow donuts to cool completely.
Use a spoon to spread the frosting on the donuts, then sprinkle the crushed Oreos onto the donuts.