This chocolate glaze recipe uses cocoa powder and the microwave, so there's no need to fuss with melting chocolate slowly over the stove the next time you want to dress up a cake, cookies, or a batch of donuts.
Place the butter or plant-based butter into a microwave-safe bowl or measuring cup and melt on high for about 25-30 seconds, or until the butter is mostly melted. Add in the cocoa powder and mix well until all clumps are broken up.
Add in the icing sugar, vanilla, and hot water and continue to mix until everything comes together into a smooth, uniform glaze mixture.
When your cake, cookies, or donuts are fully cooled, drizzle the glaze over the top and allow to set for a few minutes before serving.