4th of july ice cream cake freezing time serves 10 hy-vee nonstick cooking spray classic white deluxe cake mix coloring gel cream ice cream coloring gel 15x10-inch pan with parchment paper prepare cake mix batter according to food coloring; spread in a plastic-lined for 30 minutes stars; freeze in a row down the center of blue ice cream; freeze 30 minutes strawberry ice desired with berries and candles