1. Preheat oven to 350 degrees F. Grease a 12×9-inch baking pan
2. Beat eggs, sugar, softened margarine, flour, chocolate chunks, and 3/4 cups cocoa powder together with an electric hand mixer in a large mixing bowl until smooth. Fold raspberries gently into the batter; spoon into the prepared baking pan.
Bake in the preheated oven until a toothpick inserted into the center comes out clean and the top is a bit crusty, 40-45 minutes. Add sprinkles.
Let cool completely before cutting.