○ Cream Butter & Sugar:

○ In a large bowl, cream together the butter and sugar on medium-high speed for

2–3 minutes until light and fluffy.

○ Add Egg, Yolk & Vanilla:

○ Beat in the egg, then the yolk, and vanilla. Mix until smooth.

○ Dry Ingredients:

○ In a separate bowl, whisk together flour, baking soda, cream of tartar, salt, and

optional cornstarch.

○ Add dry ingredients to wet and mix just until combined. Don’t overmix.

○ Chill:

○ For best results, chill dough for at least 1 hour, or up to 24 hours.

○ Dough will be sticky but firm enough to scoop once chilled.

○ Shape:

○ Scoop large balls (about 3.5–4 oz each, or ~¼ cup).

○ Place spaced out on parchment-lined baking sheets — 6 per tray max.

○ Bake:

○ Bake at 350°F (175°C) for 11–13 minutes.

○ Edges should be barely golden, centers will look slightly underbaked — that’s

perfect.

○ Let cool on pan 5–7 minutes before moving.

○ Optional:

○ Sprinkle with coarse sugar while warm for sparkle and crunch.

●

🔥 Pro Tips:

○ Cream of tartar gives these the signature Subway-style chew.

○ Egg yolk adds richness and chew without puffiness.

○

Gourmet Brown Butter Chocolate Chip Cookies (4–5