1–2 minutes if it’s very firm, so it blends more easily.
Blend on medium-high speed until the mixture is smooth, thick, and pale yellow, about 20–40 seconds. If your blender struggles, stop and stir once or twice, then blend again.
Check the texture. If you like it thicker and more milkshake-like, add another scoop or two of ice cream and blend again. If you prefer it a bit lighter and more sippable, splash in an extra 1/4 cup of