Combine dry ingredients: flour, sugar, salt, cinnamon, and baking powder. Set aside.
Whisk egg, Greek yogurt, milk, and vanilla together.
Combine wet mixture into dry mixture, and fold gently. Do not over mix. (I like to use a rubber spatula and fold the batter) It is ok if the batter is still lumpy.
Heat a skillet over medium heat. Pour small scoops of batter onto the skillet or griddle once warm. Sprinkle streusel on to the bottom of each pancake. I like to set extra aside for the top of the pancakes.
Cook until golden brown on each side flipping halfway through. Takes about 1-2 minutes on each side.
Coat griddle or skillet with more butter in between each batch to prevent sticking.
Serve immediately with syrup butter and extra streusel.
Streusel Topping
Combine flour, sugar, cinnamon, nutmeg and butter.
Mix together with your hands or with a fork. The mixture should be crumbly and the consistency of wet sand. Set aside until ready to use.