If you don't have a microwave or prefer not to use one, you can easily toast the coconut flakes in a skillet or in the oven. For the skillet method, heat a large skillet over medium heat and add the coconut flakes, stirring constantly until they turn golden brown. For the oven method, spread the coconut flakes on a baking sheet and bake at 325°F (165°C) for 5-10 minutes, stirring occasionally, until golden brown.