Brown Butter Pumpkin Oatmeal Cookies

INGREDIENTS

1 cup

(2 sticks; 230g) unsalted butter

2 cups

old-fashioned whole rolled oats

and 2/3 (208g) cup all-purpose flour (spoon & leveled)

1 tsp

baking soda

1/2 tsp

salt

and 1/2 teaspoons ground cinnamon

and 1/2 teaspoons pumpkin pie spice1

1 cup

granulated sugar

3/4 cup

packed light or dark brown sugar

egg yolk, at room temperature

2 tsp

pure vanilla extract

1 cup

pumpkin puree (see note - not pumpkin pie filling and not the whole can)2

1/4 cup

unsalted butter

and 1/2 cups (180g) confectioners' sugar

3 tbsp

milk

1/4 tsp

pure vanilla extract