Out-of-this-World Cocoa Brownies

INGREDIENTS

6 tbsp

unsalted butter

1 cup

granulated sugar

large egg + 1 large egg yolk

1 tsp

vanilla extract

1/2 cup

all-purpose flour

1/2 cup

Dutch process cocoa powder, sifted

1/4 tsp

kosher or fine sea salt

2 tbsp

whole milk

4 oz

semisweet (50-60%) chocolate, finely chopped

4 oz

milk chocolate, finely chopped

1/2 cup

heavy cream

1 tbsp

unsalted butter, room temperature, cut into small cubes

rainbow bit chip sprinkles, for topping