| Serving | Ingredient | Notes |
|---|---|---|
| 4 tablespoons | unsalted butter (56g) | very soft with some melted spots |
| 3 tablespoons | granulated sugar (38g) | |
| 3 tablespoons | light or dark brown sugar (38g) | |
| 1 large | egg yolk (19g) | |
| 3/4 teaspoon | pure vanilla extract | |
| 1/2 cup | all purpose flour (86g) | spooned and leveled |
| 1/4 teaspoon | baking soda | |
| 1/8 teaspoon | salt | |
| 1/3 cup | chocolate chips, plus extra for topping |