2 c. powdered sugar
2 tbsp. cocoa
1/2 c. butter, at room temperature
2 eggs, at room temperature
1/2 tsp. vanilla
1 c. chopped nuts
1 2/3 c. vanilla wafers

Crush vanilla wafers and place half of them in the bottom of an 8x8 inch pan.

In electric beater, combine all but the nuts. Beat (and scrape sides with spatula) for 10 minutes. Carefully spoon onto vanilla wafers and refrigerate 12 hours.