This blueberry lemon ricotta crumb cake recipe is a perfect dessert for any occasion. The cake is made with flour, sugar, baking powder, salt, butter, eggs, milk, lemon zest, ricotta cheese, and fresh blueberries. The ricotta cheese adds a creamy and tangy flavor to the cake, which complements the blueberries perfectly. To make the cake, mix the dry ingredients, cream the butter and sugar, add the eggs and lemon zest, and alternate adding the dry ingredients and milk. Fold in the blueberries and ricotta cheese and pour the batter into a greased baking dish. For the crumb topping, mix flour, sugar, and butter until crumbly, and sprinkle over the cake batter. Bake for 45-50 minutes, and enjoy a delicious blueberry lemon ricotta crumb cake!