A holiday favorite with our family that I've been making over 30 years! Minor differences: 7" x 11" pan. I use 6 Tbsp. butter with the crumbs, 3 envelopes of Choco Bake instead of melting chocolate, and I chill each layer while preparing the next. It's essential to beat the butter/sugar/eggs/chocolate mixture thoroughly - up to 10 minutes. Needs at least 4 hours to chill; we have never frozen this. I sprinkle the crushed peppermint on top at serving time to prevent bleeding. Makes a rich, lush, mousse that can satisfy at least 15.