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Vegetable Oil

Neutral liquid oil: 218 g per cup — the weight that makes butter-to-oil conversions clean.

1 cup
218 g
1 tbsp
13.5 g
Butter swap
use ¾ the weight (butter is 15% water)
Olive oil
216 g/cup — same behavior
Coconut oil
218 g liquid, solid below 24°C
Storage
cool and dark, 12–18 months

About Vegetable Oil

Oil weighs slightly less than an equal volume of water (it floats) — 218 g per cup. The butter-to-oil swap runs on weight: replace 227 g of butter with ~170 g of oil, because butter is 15–18% water. Coconut oil weighs the same but state matters — melted for batters, solid for creaming-style recipes.