Preheat oven to 350°. Grease muffin cups with butter or coconut oil
Place avocados, sugar in a food processor and pulse until smooth.
Add the bananas, eggs, milk, vinegar, and baking soda to the food processor. Pulse until liquified.
Fold berries and coconut into almond flour.
Pour the banana mixture into the almond flour and mix until just combined. Do not overmix! Pour into prepared pan.
Top with Streusel topping and bake about 30 minutes, until browned on the top and a toothpick comes out only with slight crumbs, or clean.
Cool at least 10 minutes before serving.