This classic coffee cake recipe is perfect for breakfast or brunch. The cake is moist and tender, with a cinnamon and brown sugar streusel topping that adds a delicious crunch. Serve it warm with a cup of coffee for the ultimate comfort food experience. To make the cake, you'll need flour, sugar, baking powder, salt, butter, eggs, milk, and vanilla extract. For the streusel topping, you'll need brown sugar, cinnamon, flour, and butter. Mix the dry ingredients for the cake, then add the wet ingredients and mix until smooth. Pour the batter into a greased baking dish, then mix the streusel ingredients and sprinkle over the top. Bake for 30-35 minutes, or until a toothpick inserted in the center comes out clean. Enjoy!