These red velvet cake donuts are a fun twist on a classic dessert. To make the donuts, start by mixing together flour, sugar, baking powder, and cocoa powder in a bowl. In a separate bowl, mix together buttermilk, eggs, red food coloring, and vanilla extract. Add the wet ingredients to the dry ingredients and mix until well combined. Pour the batter into a donut pan and bake for 12-15 minutes. Once the donuts are cooled, dip them in a cream cheese glaze and sprinkle with red velvet cake crumbs.