Preheat the oven to 350 degrees Fahrenheit. . Prepare a 12" metal round cookie pan with cooking spray or parchment paper.

Cream the butter and sugar until light and fluffy with a hand held mixer or stand up mixer.

Add the egg and vanilla extract. Mix together until just combined, being careful not to overmix.

Gradually add the dry ingredients (flour, baking powder and salt). Mix until a dough forms.

Press the dough into the prepared cookie pan. Bake for 15-20 minutes until the edges of the cake start to brown slightly. Do not overbake as it will continue to bake in the pan.

While the cake cools, prepare the frosting.

Beat the butter until smooth in a large bowl or bowl of a stand mixer.

Gradually add the powdered sugar and mix until combined.

Add the vanilla to the mixture.

Start with 2 tablespoons of heavy cream or milk. Mix together and add 1-2 tablespoons more if needed until the desired consistency.

Decorate the cooled cake by piping the frosting around the edges of the cake and then the cake is ready to slice, serve and enjoy!