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| salted butter: 1 cup |
| whole wheat flour: 1 1/2 cups |
| all-purpose flour (unsifted): 1 cup |
| cornstarch: 1 1/2 tsp |
| baking soda: 1 1/4 tsp |
| salt: 3/4 tsp |
| dark brown sugar (packed): 1/2 cup (firmly packed) |
| light brown sugar (packed): 1/2 cup (firmly packed) |
| granulated sugar: 1/4 cup |
| vanilla extract: 1 1/4 Tbl |
| eggs: 1 (large) |
| eggs: 1 (yolk, large) |
| milk chocolate chips: 2 cups |
| 2% milk: 2 Tbl (optional) |
Credit: Food.com