Prepare the Rim: Spread Nutella on a small plate and dip the rim of a rocks glass into it. Then press the rim into crushed hazelnuts to coat.
Chill the Glass: Place the glass in the freezer or fridge while you mix the drink (optional, but keeps it frosty).
Build the Drink: Fill the prepared glass with ice cubes.
Mix the Base: In a cocktail shaker (or directly in the glass if you prefer layering), combine vodka, coffee liqueur, and hazelnut liqueur. Stir gently for 10–15 seconds.
Add the Cream: Slowly pour heavy cream over the back of a spoon into the drink to create a layered effect. Stir gently if you prefer a marbled look.
Optional Garnish: Drizzle a thin line of Nutella inside the glass or on top before serving.