Beat butter and sugar till creamy. Add next 3 ingredients. Stir together, flour, baking powder and soda and salt. Add to creamed mixture and mix well. Stir in oats and cashews. Drop by rounded teaspoonful onto greased baking sheet. Bake in a preheated 400 oven for about 8 minutes. Frost cooled cookies.
Frosting: heat butter until lightly browned. Remove from heat and cool. add milk and vanilla. Beat in sugar until smooth and thick enough to spread.
- 1/2 Stick butter
- 3 tablespoons Milk
- 1/2 teaspoon Vanilla
- 2 cups Powdered sugar