Prepare in this order, the following 4 layers.

1:

24 Oreo cookies, crushed
1/3 c. melted butter

Mix and freeze in 9x13 pan.

2:

1/2 gal. coffee ice cream or
1/2 gal. vanilla ice cream with
2 tbsp. instant coffee added

Spread layer #2 over frozen layer #1, freeze again.

3:

Mix and cook 10-20 minutes until thick, cool completely:

1 sm. bag semi-sweet chocolate chips
2 tbsp. butter
1 c. sugar
2 sm. cans evaporated milk

When completely cool, pour over frozen ice cream layer. Freeze again.

4:

After fudge layer has frozen, spread 9 ounce Cool Whip and small package of slivered almonds over all. Freeze again.