CRUSH ICE: Add 16 ice cubes to a blender. Pulse for 10 to 15 seconds, until the ice is finely crushed and snowy.
ADD INGREDIENTS: Add the chocolate ice cream first, followed by 3 ounces vodka, 3 ounces Baileys Irish Cream, 3 ounces Kahlúa, 3 ounces heavy cream or half-and-half, and 2 tablespoons chocolate syrup.
BLEND: Blend on high speed for about 45 seconds, until thick, creamy, and completely smooth. The mixture should look like a milkshake and sound steady with no ice chunks rattling.
SERVE: Pour evenly into two tall glasses.
GARNISH: Serve immediately. Add whipped cream and an extra drizzle of chocolate syrup if desired.
Notes
Ice Cream Note: Use full-fat ice cream for the creamiest texture. Lower-fat ice cream can make the drink icy instead of smooth.Make-Ahead: This cocktail is best enjoyed right after blending. Freezing leftovers is not recommended.Half-and-Half Note: If using half-and-half instead of heavy cream, the drink will be slightly lighter but still creamy. Variations:Vanilla Mudslide: Use vanilla ice cream instead of chocolate.TGIF-Style Mudslide: Use 4 scoops chocolate ice cream and 2 scoops vanilla ice cream.