This vegan blueberry crumb cake recipe is perfect for anyone who wants to enjoy a delicious dessert without any animal products. The cake is moist and fluffy, with a sweet blueberry filling and a crunchy crumb topping. To make the cake, you'll need flour, sugar, baking powder, salt, vegan butter, non-dairy milk, apple cider vinegar, vanilla extract, and fresh blueberries. Mix the dry ingredients together, then add the wet ingredients and mix until smooth. Fold in the blueberries and pour the batter into a greased baking dish. To make the crumb topping, mix flour, sugar, and vegan butter until crumbly, then sprinkle over the cake batter. Bake for 40-45 minutes, or until a toothpick inserted into the center comes out clean. Serve warm or at room temperature.