Step 1

Add the blueberries, lemon zest and ½ tablespoon of sweetener to a large microwave safe mug.

Step 2

Mix to coat.

Step 3

Microwave on high for 2 minutes.

Step 4

Meantime, in a bowl mix the almond flour, remaining sweetener and butter with a fork until a crumbly dough forms.

Step 5

Remove the mug from the microwave oven.

Step 6

Top the blueberries with almond flour mixture.

Step 7

Microwave on high for 30 seconds.

Step 8

Serve warm.