Root Beer Float Cake - Kosher.com

Ingredients

• 2 and 1/4 cups root beer, divided
• 1 cup unsweetened cocoa powder, such as Gefen
• 2 ounces bittersweet chocolate, chopped
• 1/2 cup (1 stick) unsalted margarine or butter
• 1 cup granulated sugar
• 1/2 cup Haddar Dark Brown Sugar, packed
• 3 large eggs, beaten
• 2 cups Glicks Flour
• 1 and 1/4 teaspoons baking soda
• 1 teaspoon salt
• 1/2 teaspoon ground allspice, such as Pereg
• 1 cup vanilla ice cream (dairy or nondairy), melted
• 1/4 cup (1/2 stick) margarine or butter, softened
• 1 and 1/2 cups powdered sugar, such as Gefen
• 1/2 teaspoon vanilla extract
• pinch of kosher salt