3 tiny brownie Recipes

butter , cut into pieces, dark brown sugar, granulated sugar, semisweet chocolate, coarsely chopped, unsweetened chocolate, coarsely chopped, eggs, at room temperature, vanilla extract, all-purpose flour, salt, walnut halves (optional), heavy cream, dark chocolate, coarsely chopped, white chocolate, melted and placed in a decorating bag with tiny tip (or a ziplock baggie with 1 corner cut off)

all-purpose flour, sifted, plus more for baking pans, unsweetened chocolate, coarsely chopped, unsalted butter, granulated sugar, eggs, pure vanilla extract, salt, sugar , for decorating, vegetable-oil cooking spray