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| unsalted butter: 1 cup |
| dark brown sugar (packed): 1 cup |
| granulated sugar: 1/2 cup |
| dark corn syrup: 1/4 cup |
| baking soda: 3/4 tsp |
| salt: 1 tsp |
| vanilla extract: 2 tsp |
| eggs: 2 (large) |
| smooth peanut butter: 2 cups |
| unbleached all-purpose flour (unsifted): 2 cups |
Credit: Food.com