This cinnamon roll coffee cake recipe is a delicious twist on the classic cinnamon roll. The cake is moist and tender, with a cinnamon swirl throughout. The streusel topping is made with brown sugar, cinnamon, and chopped pecans, adding a delicious crunch to every bite. To make the cake, you'll need flour, sugar, baking powder, salt, butter, eggs, milk, vanilla extract, and cinnamon. Mix the dry ingredients for the cake, then add the wet ingredients and mix until smooth. Pour half of the batter into a greased baking dish, then sprinkle with the cinnamon swirl mixture. Pour the remaining batter over the top, then mix the streusel ingredients and sprinkle over the top. Bake for 35-40 minutes, or until a toothpick inserted in the center comes out clean. Serve warm with a cup of coffee.