Preheat oven to 325. Grease a 9x13 inch baking pan and set aside.
In the bowl of an electric mixer fitted with a whisk attachment, beat whole eggs on high speed for 8-10 minutes, until thick, foamy and they’ve expanded their bulk.
Meanwhile, prepare the chocolate mixture. Melt the chocolate in a double boiler or heat-proof bowl fitted over a small pot of boiling water. Once melted, add the whip and stir until combined. Remove from heat and set aside to cool for a couple of minutes.
Add sugar, cocoa and vanilla extract to the chocolate mixture, and stir to combine.
Add the chocolate mixture into the beaten eggs, and stir until just combined - do not overmix.
Pour batter into prepared pan and bake for about 50 minutes, until the center feels set.
Once cooled, cut into squares and garnish as desired before serving.
Plan Ahead: Cover cake well and store in the freezer until ready to use.
Recipe by Overtime Cook at https://overtimecook.com/2018/03/15/flourless-fudge-cake-without-butter-margarine/