After the dough has risen, turn it out onto a floured surface. Roll it out into a rectangle, approximately 14 inches by 12 inches. You don’t have to get your tape measure out—just aim for a long rectangular shape.
Next, brush the dough with milk. This helps the filling stick to the dough and keeps it nice and moist. Sprinkle the prepared filling evenly across the dough, then cut the dough into four strips.
Roll up each strip, pinching the edges to seal in the filling, just like you would with cinnamon rolls.
Next, coil the strips into two spirals (one for each coffee cake) and place them into greased pie pans. If you don’t have pie pans, you can make do with any oven-safe dish.
Top each coffee cake with the buttery streusel topping. For the best result, try to break up the butter into nice, crumbly pieces as you sprinkle it on top.