Surprise-Interior Cake with Dartmouth "D" Recipe | Food Network

Ingredients

• Nonstick spray
• 12 ounces (3 sticks) unsalted butter, at room temperature
• 3 cups (600 grams) sugar
• 7 large eggs, at room temperature
• 1 teaspoon vanilla extract
• 4 1/2 cups (540 grams) all-purpose flour
• 1 teaspoon salt
• 1 tablespoon baking powder
• 1 cup nonfat buttermilk
• 3 or 4 drops green food coloring (or whatever color you wish)
• 10 egg whites
• 2 cups (400 grams) sugar
• Pinch salt