Use a stand mixer to mix the sweet cream with the powdered sugar. Mix until the texture is like small pebbles.
Mix in the heavy cream until thoroughly blended. The frosting is the right consistency when it can stand while forming stiff peaks. If not, mix in additional powdered sugar until it does.
Add 2 TBSP of cinnamon and mix well.
Fill a pastry bag with a large tip with frosting and frost your cupcakes.
Mix 2 TBSP cinnamon with 2 TBSP sugar. Then sprinkle cinnamon/ sugar mixture on top of frosting and enjoy!