Butter
Butter is a vegetable ingredient used for flavor, color, or body. Cut size controls how fast it cooks, while surface dryness helps when browning matters.
Identity
Vegetable
Cut size controls cooking speed.
Small cuts soften quickly and spread flavor through a dish. Larger pieces keep more bite and shape. Dry the surface when browning matters, then season after tasting.
Wikimedia Commons
Reference image
Butter reference image.

Source: Wikimedia Commons
Used In Recipes
Substitutions
Acceptable
Plain Yogurt -> Butter
3 tablespoons plain yogurt (Greek or regular) or additional melted butter
The source lists this as an alternative in the same ingredient row.
Source: Strawberry Rhubarb Crisp