Balsamic Butter Sauce - cooking recipe

Ingredients

1 stick cold butter, cut into 8 pieces
3/4 cup balsamic vinegar
salt and ground black pepper to taste

Preparation

Melt 4 pieces of butter in a small saucepan. Add balsamic vinegar. Simmer until reduced by half and consistency is thick and syrupy, about 15 minutes. Remove from heat and whisk in remaining butter. Season with salt and pepper and let cool.