In a small bowl with a wide mouth, stir together cream cheese and powdered sugar. Add chopped walnuts to a separate small wide mouthed bowl. Rim four shot glasses with the cream cheese frosting and then in the chopped walnuts.

Combine fresh carrot juice, heavy cream, Irish cream, vodka and cinnamon in a cocktail shaker filled with ice. Shake several times to combine. Strain into the four rimmed shot glasses. Serve immediately.