Place blackberries in a mug, mason jar, or oven-safe dish, and cook in the microwave for 5-10 seconds for fresh berries or 15 seconds for frozen.
Add wet ingredients and stir.
Mix in dry ingredients well.
Fold in chocolate chips.
Place in the microwave on 45-60 seconds.
Allow to cool for a few minutes.
Top with whipped cream (optional, but makes it really good), more berries and chocolate chips.
Notes
While whipped cream is totally optional, it really adds a nice balance to the chocolate. Even just a splash of cream or milk on top would be yummy.This can be made gluten free using a gluten free one-to-one flour. The texture will be a bit different, but my daughter still really liked it.