Coffee cake

A coffee cake can be either.
Coffee cakes are typically single layer cakes that may be square or rectangular like a Stollen. Coffee cakes are typically flavored with cinnamon, nuts, and fruits. These cakes sometimes have a crumbly or crumb topping called Streusel and a light glaze drizzle. In American, they are frequently eaten at festive breakfasts.
Coffee cakes can be similar to teacakes, but teacakes are often smaller individual items served with tea.