Remove from heat and whisk in the sugar. Add the eggs, whisking in one at a time. Add the flour, food coloring, baking powder and vanilla until fully combined.
*If you don't have a double boiler (I don't either!), make your own. Pour a couple inches of water in your smallest saucepan and place a heat-safe bowl (such as Pyrex) over the bowl so it is not touching the water. Bring the water to a simmer and there, you made yourself a homemade double boiler.