The original recipe is not EXACLTY what you see on the modern package. Who knows when it changed, but the OG recipe includes a splash of hot water. As copied from the Toll House Cookbook:
Ruth Wakefield’s Chocolate Crunch Cookies
1 cup unsalted butter, plus more for baking sheets
3/4 cup firmly packed light-brown sugar
3/4 cup granulated sugar
2 large eggs, beaten
1 teaspoon baking soda dissolved into 1 teaspoon hot water
2 1/4 cups sifted all-purpose flour
1 teaspoon table salt
2 bars Nestle’s yellow label chocolate, semi-sweet, which has been cut into pieces the size of peas
1 teaspoon vanilla extract
Preheat your oven to 375°.
Cream the butter and sugars. Add the beaten eggs. Add the baking soda dissolved in hot water.
Sift together the flour and salt and add to the butter mixture. Then stir in the nuts, chocolate chips, and vanilla.
Chill the dough
Drop by the tablespoonful onto lightly greased cookie sheets and bake until browned at the edges, 10 to 12 minutes.
Here’s what’s interesting to me – the vanilla is added last! And the baking soda is dissolved into hot water? Both felt very confusing before starting baking, and I will admit that these quirks made me want to try this recipe. I physically had to restrain myself from adding the vanilla to the egg step and even adding at the end felt weird and like it would not be incorporated. But it seemed to? Dissolving the baking soda was a new step for me too. So I had to look it up.