Cookie Sheets & Sweets' 6-Ingredient Brown Sugar Cookies

Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a bowl, mix melted butter and dark brown sugar together with a whisk until smooth.

Add egg and vanilla extract; whisk for 1 minute until glossy.

Stir in all-purpose flour and baking soda with a spatula until dough forms.

Scoop 2-tablespoon balls of dough onto baking sheet spaced 2 inches apart.

Bake for 9 to 11 minutes until edges are golden brown.

Let cool on the sheet for 5 minutes before serving.