I tried a burger I saw on Instagram... Cooked down onion and added espresso, brown sugar and ACV then added the bacon. Simmered it down for about 45 minutes. 2x 4oz smash patties with cheese. Wife came in clutch with her sourdough starter and popped out some buns last night. Slabbed some pb on each bun. Not sure it's worth the effort regularly, but man it's a good bite.