As for the streusel topping, you'll need extra of a few of the ingredients you've already compiled for the bread. The streusel ingredients include unsalted butter, brown sugar, flour, and cinnamon.
In a separate bowl, mix together flour, brown sugar, cinnamon, and salt ... The next day, pre-heat your oven to 350 degrees. Sprinkle streusel evenly over the top of the bread mixture.
crunchy topping for desserts like cinnamon coffee cakes, apple pies, fruit crumbles, and sweet bread. A standard streusel recipe combines butter, granulated sugar, brown sugar, and flour.