Whisk together the flour, baking soda, salt, and sugar. Place half the mixture into the jar, packing it well. Add half the chocolate chips on top. Add the brown sugar, pack firmly. Add the remaining chocolate chips and seal the jar.
Write out a label with baking instructions to include with the jar.
Preheat oven to 375 degrees. Line two baking sheets with parchment paper.
In a large mixing bowl, beat together ¾ cup room temperature butter, 2 large eggs at room temperature, and 1 teaspoon of vanilla until fluffy. Empty the contents of the jar into the bowl and mix. Drop tablespoons of the dough onto the baking sheets, spacing about 2 inches apart. Bake for 8-10 minutes. Let cool on the pans. Enjoy!