Whipped Brown Butter Blondie Cups

Method

1. Gather and prep everything first: unsalted butter, granulated sugar, all-purpose flour and set within reach of the stove.
2. Warm a splash of olive oil in a heavy pan over medium heat, then add the yellow onion and cook until soft and fragrant, about 4 to 5 minutes.
3. Turn the heat up, add the brown butter blondie, and cook until deeply browned and aromatic.
4. Stir in the dijon mustard along with a good pinch of salt, scraping up anything stuck to the bottom of the pan.
5. Taste and adjust, then finish with a handful of herbs right before serving.
6. Serve warm, ideally with something to soak up the sauce.