½ cup cocoa (the handwritten version of the recipe didn't give an amount...so this can be adjusted to suit your taste)
Instructions
Preheat the oven to 350. In a large mixing bowl, cream shortening, sugar, peanut butter, eggs, and vanilla. Add dry ingredients. Spread onto large cookie sheet. Bake at 350. Cool partly before glazing. For glaze: combine water and butter. Bring to a boil. Remove from the heat and add cocoa. Blend well, then add sugar and vanilla. Beat until smooth, then spread over the dessert. Let cool and cut into bars.
Recipe by Amish 365 at https://www.amish365.com/peanut-butter-fingers/