Brown Butter Apple and Brie Grilled Cheese 3 Steps
Quarter the peeled and cored Granny Smith apple, then slice each quarter into slices approximately 2-3 millimeters thick.
Heat a pan on medium high heat for 3-4 minutes, add in half of the butter and immediately begin swirling in the pan. The butter should sizzle and turn slightly brown almost immediately. Continue swirling the pan until all of the butter has melted and browned, removing from the pan if the butter begins to darken too quickly. This entire process will take approximately 20-30 seconds. Add in the sliced apples and cook for 1-2 minutes tossing in the pan to move the apples around. Add in the brown sugar and allow to cook for another 1-2 minutes until the apples start browning around the edges and begin to soften. Add in the apple cider vinegar as well as a pinch of kosher salt and black pepper, and remove from the heat. Allow the apples to cool entirely before assembling the sandwich.
To assemble the sandwiches: layer 1 slice of sourdough with half of the sliced brie, then an even layer of the cooled brown butter apples. Top with the remaining sourdough bread slice. Butter both sides of the sandwich with the remaining butter and sear in a pan on medium heat until the bread is golden brown and the cheese has melted.