Preheat oven to 350 degrees and grease an 8x8 pyrex dish.
In a bowl combine almond flour, arrowroot flour, baking soda, baking powder, salt and coconut sugar and whisk to combine. Then add in 2 tablespoons almond milk, ghee, eggs and vanilla extract and whisk to fully combine.
Pour half of the batter in the greased dish.
Make streusel by combining all of the streusel ingredients in a bowl. Pour half of the streusel onto the batter, followed by the other half of the batter, then the rest of the streusel.
Place each blackberry gently on top of the cake so they don’t sink.
Bake for 35-40 minutes or until browned on top and cooked through.
If any liquid from the blackberries is sitting on top of the cake when it is done baking, just use a paper towel to soak it up!