| Item | Quantity |
|---|---|
| All-Purpose Flour | 555g (4 cup) |
| Powdered Sugar | 135g (1 1/8 cup) |
| Diamond Crystal Kosher Salt | 1 1/2 tsp |
| Baking Soda | 1 1/2 tsp |
| Baking Powder | 1 1/2 tsp |
| Vanilla Bean— split and scraped; optional, but less aromatic if omitted | 3 count (12g) |
| Cultured Lowfat Buttermilk— or 50/50 mix of plain nonfat Greek yogurt and milk | 1185g (5 1/4 cup) |
| Unsalted Butter— browned | 120g |
| Egg Whites— from large eggs | 6 count (210g) |
| Vanilla Extract | 3 tsp |
| Maple Syrup— for serving | 240g (3/4 cup) |