Preheat your oven to 350 degrees Fahrenheit.
Prepare your cake pans by greasing them, lining them with parchment paper, and dusting them with flour.
In a blender, blend the eggs, sugar, vegetable oil, and milk.
Transfer the mixture to a large bowl and add the all-purpose flour, 1 teaspoon of cinnamon, and baking powder.
Pour the batter into a greased and floured round cake pan. Bake in a preheated oven at 350 degrees Fahrenheit for 40 minutes
The cake will be close to being done when your whole kitchen starts to smell like cinnamon. At that point, watch like a hawk, and it will be done when you can insert a toothpick in the center of the cake, and it comes out clean.
Take your cakes out of the oven, set them on a cooling rack, and wait until they cool down to room temperature