¼applepeeled, cored, and diced (about ¼ cup diced)
1tablespooncoconut sugaryou can also use brown sugar
1/8teaspoonkosher or fine sea saltomit if using salted butter
1tablespoonchopped walnuts or other nut of choice
Melt ½ tablespoon butter in a microwave-safe mug for about 30 seconds on high power. Swirl the mug so it gets coated with butter. Add the 6 tablespoons almond flour, 2 tablespoons coconut sugar, almond milk, egg, vanilla, ¼ teaspoon cinnamon, baking soda, and 1/8 teaspoon salt. Mix well. Add the apple and mix in.
In a small bowl, combine the 2 tablespoons almond flour with 1 tablespoon butter, 1 tablespoon coconut sugar, ½ teaspoon cinnamon, and 1/8 teaspoon salt, if using. Smash the mixture together with a fork or your fingers until crumbly. Sprinkle on top of the cake. Top with nuts.
Microwave on high power for 1 minute, then continue microwaving at 10 second intervals until the cake has risen and set – it takes 1 minute 40 seconds in my microwave. Serve warm.