Mix the two hot chocolate packets into the warmed milk.*
Pour the chocolate milk, white milk, half & half, chocolate syrup and chopped ice into a blender.
Blend on high speed for 20-30 seconds, or until the ice is completely blended and smooth.
Pour into four glasses.
Top with whipped cream and chocolate syrup.
Serve immediately.
Video
Notes
*I often do this step ahead of time, then place the chocolate milk into the refrigerator to cool. This helps keep the frozen hot chocolate as cold as possible. If you do this step, stir the chocolate milk before you add it to the blender because some chocolate will settle at the bottom of the cup.The calories shown are based on the dividing the recipe between 4 cups, with 1 serving being 1 cup. Since different brands of ingredients have different nutritional information, the calories shown are just an estimate.