Preheat oven to 350F degrees.
Grease a cake pan.
Place slices of oranges in the bottom of the pan to fill it.
Combine flour, sugar and baking powder in a mixing bowl.
Add milk, orange juice, butter and vanilla to the dry ingredients.
Beat on high for 2 minutes.
Add eggs and beat for 2 more minutes.
Pour batter on top of orange slices and bake for approximately 45 minutes until a toothpick inserted in the center comes out clean.
Cool cake for 5 minutes before turning out onto plate.
While the cake is still warm top it with orange marmalade. You can put as much or as little as you want.
