Start by preheating your oven to 350°F (175°C). This ensures it’s nice and hot when you're ready to bake your cookies.
Mix the softened butter and granulated sugar until the mixture is smooth. This usually takes about 2-3 minutes.
Next, add the egg and vanilla extract. Mix until fully combined.
Stir the sourdough discard into the mixture until thoroughly combined. This is where your cookies get their special tangy flavor.
Whisk your flour, baking soda, baking powder, and a little bit of salt.
Stirring gently (all the ingredients), until fully combined.
I highly recommend chilling the dough in the fridge for about 30 minutes.
Scoop small portions of dough using a spoon or cookie scoop to form dough balls. Roll them in granulated sugar to coat them lightly. Arrange the dough balls on the prepared baking sheet, ensuring they are spaced apart. And bake for about 10 minutes.
Allow your sourdough sugar cookies to cool on the baking sheet for a few minutes before transferring them. And enjoy!