Brown Butter Symphony Cookies

Name: Brown Butter Symphony Cookies
Prep time: 20 min
Cook time: 10 h
Total time: 10 h 20 min
Cuisine: World Cuisine
Ingredients: 1 1/2 sticks (6 oz) unsalted butter; 1 cup dark brown sugar, packed; 2 eggs; 2 tsp vanilla bean paste, or vanilla extract; 1/8 tsp almond extract (optional); 2 cups all purpose flour; 1 tsp baking soda; 1 tsp kosher salt; 1 (4.25 oz) Hersey almond toffee symphony bar, roughly chopped (plus more for topping each cookie, if desired); 3/4 cup toasted slivered almonds; Flakey sea salt, for topping, if desired