With the mixer running on medium-low, add butter 1 tablespoon at a time. Mix until the ingredients are a sandy texture.
⅓ cup unsalted butter
In a measuring cup or bowl, mix the egg, milk, and vanilla extract.
1 large egg, 1 cup whole milk, 1 tsp vanilla extract
With the mixer running, add milk mixture to the dry ingredients and mix until no dry streaks remain.
Grease two 8-inch round cake pans and evenly distribute the batter between pans. Bake in preheated oven for 20-30 minutes until just slightly golden and a wooden skewer inserted comes out clean.
Remove from oven and cool in pans for 10 minutes. Then invert onto a cooling rack and cool until completely cooled.
While cooling, prepare the whipped cream.
For the whipped cream
Whip cream cheese until light and fluffy.
4 oz cream cheese
Add heavy cream, sugar, vanilla extract, and orange zest.