Grandma's favorite

In my mother's handwriting, I found a recipe card that said "Mother's favorites." I think I surely got my sweet tooth from my Grandma!

Crisp Peanut Butter Cookies

1 c. butter
1 c. white sugar
1 c. brown sugar
1 c. peanut butter
1/2 c. sour milk
2 t. soda
1 t. vanilla
1/2 t. salt
3 1/2 c. sifted all purpose flour

Cream butter, add sugar and cream well. Add peanut butter and blend thoroughly, then add vanilla. Add milk, blended with soda, then salt. Add sifted flour and mix thoroughly.* Chill and slice into 1/8 inch thickness. Place on a lightly greased cookie sheet and bake in center of a moderate oven (375 degrees) for 8 to 10 minutes.

*I think my mother left out a step here--to chill these and slice them, I think you might want to roll the dough into a log first! She also added: These can be dropped rather than chilled--press with a fork.