Chocolate Oatmeal Peanut Butter Sandwich Cookies

INGREDIENTS

Eggs, large

2 3/4 cups

Rolled oats, old fashioned

1/2 cup

Peanut butter, creamy natural

1 1/2 cups

All-purpose flour

1 tsp

Baking soda

1 3/4 cups

Brown sugar, light or dark

1/4 cup

Dutch processed cocoa, powder

3/4 cup

Powdered sugar

1 1/4 tsp

Sea salt, fine-grain

1/2 tsp

Sea salt

2 tsp

Vanilla extract, pure

1 1/8 cups

Butter, unsalted

3 tbsp

Whole milk