Start your day with a slice of moist and flavorful coffee cake. This cake is perfect for breakfast or brunch, with its crumbly streusel topping and a hint of cinnamon. The batter is made with flour, sugar, butter, eggs, sour cream, and a touch of coffee or espresso powder. It can be enjoyed on its own or served with a cup of coffee or tea. Coffee cake is a comforting and delicious treat to kickstart your day.