Biskuit buatan sendiri

Bahan-bahan (8 porsi)

• 8 Tbsp butter (salted, $1.12)
• 2.5 cups all-purpose flour ($0.39)
• 1 Tbsp baking powder ($0.06)
• 1/2 tsp baking soda ($0.02)
• 3/4 tsp salt ($0.05)
• 1 cup whole milk ($0.38)
• 1 Tbsp vinegar (see notes, $0.06)