Chocolate Squares with Nuts and Whipped Cream

Preheat the oven to moderate temperature (170°F)

Beat the butter with 1/2 cup sugar and 2 tablespoons lime juice until creamy

Add the egg yolks, orange zest, flour, and cocoa powder; mix well

Pour the batter into a 9x13-inch baking dish and bake for 10 minutes

Beat the egg whites in a separate bowl until stiff peaks form with the remaining lime juice and gradually add the remaining sugar without stopping

When the egg mixture is firm, add the chocolate and nuts

Remove the baking dish from the oven and let it cool for 10 minutes

Dollop the whipped cream over the partially baked batter and top with the egg mixture (if using damson gelatin, add 2 tablespoons freshly squeezed lime juice)

Bake again at moderate temperature for 30 minutes

Let it cool and cut into squares.