1In a saucepan, combine butter, 1 cup milk, 1.5 tsp vanilla, and 3 dashes of cinnamon. Bring to a boil, then simmer.
2In a stand mixer, whip together 4 eggs and 2 cups of sugar on high speed for 5 minutes.
3Add the milk mixture to the egg mixture, then reduce the mixer speed to medium.
4In a separate bowl, mix together 2 cups of flour, 1 tsp salt, and 1 tbsp baking powder. Add this dry mixture to the wet ingredients and mix for 5-7 minutes.
5Pour the batter into a greased 9-inch springform pan. Bake in a 325°F (163°C) oven for 25-30 minutes.