This paleo blueberry crumb cake is a delicious and healthy option for those following a paleo diet. The cake is made with almond flour, coconut flour, and honey, and is sweetened with fresh blueberries and a touch of cinnamon. The crumb topping is made with almond flour, coconut sugar, and coconut oil, and is sprinkled over the top of the cake before baking. The result is a moist and flavorful cake that is perfect for breakfast or dessert. Serve the cake warm with a cup of coffee or tea for a satisfying and guilt-free treat.