Turn your discard into delicious sourdough chocolate chip cookie bars. They have a wonderful texture that is a mix of cakey and chewy with great depth of flavor.
Preheat your oven to 350℉ and line a 9x13-inch pan with parchment paper.
In a large bowl, stir together the melted butter, brown sugar, and sugar.
Stir in the eggs and vanilla until uniform.
Add the starter and mix to combine.
In a medium bowl, stir together the flour, baking soda, and salt.
Add the dry ingredients to the wet ingredients and mix until just combined.
Fold the chocolate chips into the dough. You can transfer the dough mixture into the prepared pan to bake right away if you would like. You could also let it ferment on the counter for up to two hours or in the refrigerator for up to 2 days.
Spread the cookie dough into the lined pan. Bake for 25-30 minutes or until the edges are golden brown.