Can You Swap Butter for Oil in Baking?

SALTY SAFFRON BROWN BUTTER COOKIES 1/2 cup salted butter, browned 1/2 cup light brown sugar 1/2 cup white granulated sugar 1 tsp vanilla 1 egg 1 1/2 cups AP flour 1 tsp baking soda Pinch Kosher salt 1 tbsp saffron water (pinch of saffron threads, ground dissolved with 5 ice cubes left out to melt or 3 tbsp hot water) Brown the butter, set aside to cool Mix brown butter, brown sugar, white sugar, egg, vanilla, & saffron water Mix the dry ingredients As the dry to the wet and fold until combined A