1 1/2 oz of Tequila
1 1/2 oz of chocolate liqueur
2 oz of cream
1/2 tsp of cinnamon
3/4 cup of crushed ice (or ice)
Combine all ingredients except cinnamon in a blender and blend at high speed until smooth. Pour into a chilled margarita glass. Sprinkle the top with cinnamon, and serve.