Frosty Pumpkin Pie

• 4 1/2 whipped topping (frozen)
• 1 aromatic bitters
• 475 ml butter pecan ice cream
• 350 gr gingersnap crumbs
• 250 gr pumpkin
• 55 gr butter
• 55 gr brown sugar
• 18 gr pecans
• 1 gr salt
• 1 gr ginger (ground)