Do not over-bake the cookies; they should still look a little doughy when removed from the oven.
Cool the cookies on the baking sheet for 5 minutes before transferring to a wire rack.
Store in an airtight container at room temperature for up to 5 days or freeze for up to 2 months.
To test if baking soda is active, combine 1/2 cup hot water, 1/4 teaspoon vinegar, and 1/4 teaspoon baking soda; a reaction should occur immediately.
To test if baking powder is active, add 1/2 teaspoon baking powder to 1/2 cup hot water; it should bubble immediately.
If using a convection oven, decrease baking temperature by 25 degrees.
You can substitute unsalted butter, coconut oil, vegan butter, or browned butter for salted butter.
For egg substitutions, refer to the eggless chocolate chip cookies recipe.
Organic cane sugar can be used instead of granulated white sugar.
Dark brown sugar can be used instead of light brown sugar for a stronger molasses taste.
Unbleached, all-purpose flour is recommended, and all-purpose gluten-free flour works well.
If using salt other than pure, fine sea salt, start with 1/2 tsp and adjust to taste.
You can use chocolate chunks, chopped chocolate, or chocolate chips; choose your favorite variety (milk, semisweet, dark).
To freeze cookie dough, roll into balls, flash-freeze on a parchment-lined baking sheet, then transfer to an airtight container and freeze for up to 2 months.
To bake frozen dough: thaw first at room temperature for 1-2 hours then bake at 375 degrees F, or bake from frozen at 350 degrees F for 15 minutes (place in oven as it preheats).