Preheat oven to 350℉

In a microwave safe bowl, melt the butter until just melted. Tip: Melt 3/4 of the way, then whisk until all melted.

Add sugars and mix with a spatula or wooden spoon.

Add egg and vanilla. Mix again until well incorporated.

Add in baking soda, baking powder, salt. Once that is mixed in add the flour.

Incorporate flour into dough until all flour bits have disappeared.

Add half chocolate if you want some to sprinkle on top. If you have other decorating plans, add it all in.

Press into 11" parchment lined springform pan. If you don't have one, you can make you own guide by creating a tin foil ring that has an 11" diameter. If you find something smaller than an 11" (a 9" springform pan for example) watch closely and reduce baking time.

Bake for 12-15 minutes - be careful, do NOT over bake or the cookie cake will be the soft and chewable cake you're looking for. I try to look for the edges and top starting to just brown.

Remove from oven and let cool completely.

Frost or decorate as desired.