For the cake layer:

1. Preheat oven to 375 degrees F.
2. In a medium bowl cream together the butter and sweetener.
3. Add the egg and beat well.
4. Add the vanilla extract and mix well.
5. Add in the almond flour, coconut flour, salt, baking powder and mix until well combined. Pour in the almond milk and mix again until batter is smooth.
6. Grease a large mug (oven-safe) or small ramekin with butter or non-stick cooking spray. Spread the batter evenly in the bottom. Sprinkle the blueberry evenly on top of the batter.

For the cream cheese layer:

1. Heat the cream cheese for 30 seconds in the microwave. Beat with a fork until smooth.
2. Add the egg white and creamer or sweetener and beat with a fork until smooth. Pour over the top of the blueberries.

For the streusel topping:

1. Melt the butter in a small bowl. Stir in the almond flour and sweetener until fully combined. Crumble over the top of the cream cheese layer.
2. Bake for 15-20 minutes or until a knife inserted in the center comes out clean and the top is golden brown.

Enjoy!