Gather ingredients: milk, ice cream (or frozen yogurt), and desired flavorings (optional)
Choose a flavor option: chocolate syrup, vanilla extract, fruit (banana, berries), peanut butter, or caramel
Add 1 to 2 cups ice cream to a blender
Add 1/2 to 1 cup milk (start with less, then adjust for thickness)
Add flavoring ingredients as desired (e.g., 1 to 2 tablespoons syrup or 1 to 2 tablespoons fruit)
Blend until smooth and thick
Taste and adjust thickness by adding more milk (thinner) or more ice cream (thicker)
Pour into a glass
Serve immediately