Yes, you can stir in 1 or 2 teaspoons of natural extract like coconut extract, banana extract, or almond extract.u003cbr/u003eFor a chocolate custard, you can whisk in 3 to 4 tablespoons of unsweetened cocoa powder in the warm milk at the beginning of the recipe.u003cbr/u003eAlso, if unsweetened cocoa is added, the custard will be thicker and less sweet, so increase the sugar and adjust the milk to reach your favorite consistency.