Freeze the Glasses: Place your milkshake glasses or jars in the freezer for 15 minutes before blending. Frosted glassware prevents the boozy shake from melting too quickly as you sip.

Blender (paid link) Pitcher (paid link) Capacity: Check your blender (paid link)’s liquid capacity; if it holds under 72 oz, measure out half the ice cream and liquids to blend in two seamless batches.

Liquids First: Pour the coconut milk, bourbon cream, and white rum into the bottom of the blender (paid link) canister before adding the ice cream and cookie crumbs so the blades catch the liquid right away.

Soft Scoop the Ice Cream: Let the ice cream sit on the counter for 3 to 5 minutes so it is scoopable before adding it to the blender (paid link) jar; this helps the blender (paid link) incorporate the coconut milk without needing extra liquid.

Spirit Swaps: If you don’t have bourbon cream, substitute Irish cream liqueur (like Baileys) 1:1. You can also replace white rum with spiced rum, dark rum, or a straight pour of bourbon.

Non-Alcoholic Version: Omit the bourbon, cream liqueur, and white rum entirely, and replace them with ½ cup whole milk or oat milk plus 2 tablespoons melted Biscoff cookie butter spread.

Non-Dairy / Vegan Alternative: Swap the vanilla ice cream for dairy-free vanilla oat milk ice cream, replace the bourbon cream with vegan coconut or almond cream liqueur, and use dairy-free whipped topping.