Design Eat Repeat

2 In a large microwave-safe bowl, add the unsalted butter [adjustable](2 cups, i.e. 4 sticks)[/adjustable] and cover with a paper towel (will help for splattering). Melt the butter in the microwave for 30-60 seconds until all is melted (no chunks left).
3 Mix in light brown sugar [adjustable](2 cups) and granulated sugar (1 cup)[/adjustable] and use a spatula to stir until combined.
8 Stir in eggs [adjustable](4 large) and vanilla extract (1 tablespoon). Next, mix in baking soda (1 teaspoon), baking powder (1 teaspoon), and salt (1 teaspoon)[/adjustable]. 
9 Add in all-purpose flour ([adjustable]5 cups)[/adjustable] and mix until all the flour disappears into the dough. The dough WILL be wet and sticky, this is normal.
4 Mix in all chocolate chips or mix-ins [adjustable](4 cups total).[/adjustable]
5 Spray a rimmed half-sheet pan with nonstick spray and line with with parchment paper. Press dough into an even layer in the pan.
10 Cut into 60 squares (a bench scraper works well for this), cover with plastic wrap, and freeze pan for 1 hour, or until dough is frozen. Remove from freezer, break into individual squares or slabs, and freeze in a freezer-safe bag or container. On each bag or container, write the date you made them and the instructions "Bake from frozen at 350℉ for 11-13 minutes."Baking times will vary based on oven and size of squares you cut. Remove from oven when the edges look lightly golden brown and the center looks a tiny bit wet. They will finish baking on the hot pan as they cool.