This isn't quite exact, but 1/4 cup of butter (so a half stick if you're in the US) is 57 grams according to the conversion chart from allrecipes below. So use just a slightly heavy 1/4 cup or 1/2 stick. By the way, a 1/4 cup is 4 Tablespoons.
Classification: 48.00 x 40.00, Stringer-Class, Double-Face Non-Reversible, Partial 4-Way, Multiple-Use, New Manufacture. At ManufactureAt Manufacture At 25% MC At 25% MCAt 25% MC At 19% MC At 19% MCAt 19% MC At 15% MC At 15% MCAt 15% MC At 12% MC At 12% MC. Average Pallet Weight 58 lbs.
Constructed from recycled wood pallets. Board size and spacing may not be uniform. Top Boards: Approximately 7 (50% or higher coverage) Bottom Boards: 5; Wood slats are nailed together. Fork openings are on the width side. DIMENSIONS: Height: Approx. 4 1/2 CAPACITY: Weight capacity in the chart refers to fork capacity. STYLE: Grade A type pallet.