Begin by ensuring your blender is clean and ready for action. Measure out 1 cup of cookie dough ice cream and take out approximately 3 tablespoons of milk. Place these ingredients into the blender and secure the lid.

With the lid in place, blend the mixture on high speed for about 30 seconds until smooth. If the mixture is too thick, you can adjust in the next step.

Pause the blender and check the texture. If you prefer a thinner shake, gradually add more milk, blending for an additional 15 seconds after each addition.

Once your desired thickness is achieved, carefully pour the milkshake into a tall glass. Top with whipped cream, chocolate syrup, or edible cookie dough if desired.