Peanut Butter Whoopie Pies

2 c. brown sugar
1/3 c. peanut butter
1/2 tsp. salt
1/2 c. whole wheat flour
1/3 c. margarine
2 tsp. soda, dissolved in 3 Tbsp. boiling water
2 eggs
2 c. flour
1 tsp. baking powder

Cream sugar, margarine, peanut butter and eggs. Add flour, salt and baking powder. Add soda water. Beat. Drop on pans. Bake for 8 to 10 minutes at 350 degrees.

Frosting:
3 c. powdered sugar
1/3 c. milk
1/2 tsp. salt
1/3 c. peanut butter
1 Tbsp. hot water
Mix together all ingredients. Spread between two
cookies.