Preheat the oven to 350°F (177°C).

Line a baking tray with parchment paper.

Add the butter to a saucepan

Heat over medium heat.

Stir while the butter melts and foams.

Continue cooking until golden brown specks appear and the butter smells nutty.

Remove from heat

Let the browned butter cool slightly.

In a large bowl, add the brown sugar

Add the granulated sugar

Pour in the cooled browned butter.

Add the egg

Add the vanilla extract.

Mix until smooth.

Add the flour.

Add the baking soda.

Add the baking powder.

Add the cornstarch.

Add the cinnamon if using.

Mix until a dough forms

Fold in the mini chocolate chips.

Place the dough in the freezer for 10 minutes.

Scoop small dough balls using 1 teaspoon of dough each.

Place cookies on the baking tray with space between them

Bake for 7–8 minutes.

The edges should look lightly golden while the centers stay soft.

Let the cookies cool on the tray before moving them.