Gooey Nutella Cookie Cake

Freeze 1/2 to 2/3 cup of Nutella in a circle shape for 20-30 minutes until firm. In a large bowl, whisk the brown butter, granulated sugar, and brown sugar until combined. Add the eggs, egg yolk, vanilla, and heavy cream, then whisk until fully combined. In a separate bowl, whisk together the flour, baking soda, and salt. Add the dry mixture to the wet mixture and mix until almost combined. Fold in the chocolate chips. Cover the bowl with plastic wrap and chill for at least 1 hour. Preheat oven to 325 F and line a 9-inch springform dish with parchment or lightly grease. Spread half the cookie batter into the pie dish. Place the frozen Nutella disc on top. Spread the remaining batter over it, covering fully and sealing the edges. Bake for 30-40 minutes, until the edges are set, the top is golden brown, and the center has a slight jiggle. Let cool at least 45 minutes before slicing for clean pieces.