2 cups All-purpose Flour 250g
½ cup Unsweetened Cocoa Powder 43g
1 tsp Baking Soda 4.6g
¼ tsp Salt 1.5g
½ cup Vegetable Shortening 113.5g
1 cup Granulated Sugar 200g
1 Whole Egg 44g
1 Egg Yolk 17g
1 tsp Vanilla Extract 4.2g
½ cup Buttermilk 122.5g
½ cup Hot Water
1½ cups Marshmallow Fluff
1¼ cups Unsalted Butter 283.75g
1 cup Powdered Sugar 120g
Pinch Salt 0.2g
1 tbsp Vanilla Extract 13g