1½cupspretzel crumbs, approximately 4 cups pretzels
½cupbrown sugar, firmly packed
1teaspoonground cinnamon
½cup unsalted butter, melted
Filling
28ozsweetened condensed milk, 2 (14oz) cans
6egg yolks, large
½cupKey lime juice
2teaspoonspure vanilla extract
1tablespoon Key lime zest, or lime zest
whipped cream for topping, optional
Instructions
Crust
Heat oven to 350°F.
Combine pretzel crumbs, brown sugar, and cinnamon in a food processor. Add butter and pulse until combined. (Or mix crust ingredients in a bowl.)
Lightly spray 9-inch pie plate. Drop the crust mix into the pan and firmly pat down evenly with the bottom of a measuring cup or the palm of your hand.
Bake crust 7 minutes. Remove from oven. Turn oven down to 325°F.
In the bowl of an electric stand mixer, pour in the sweetened condensed milk, egg yolks, Key lime juice, and vanilla extract. Beat on medium-high until mixed well.
Stir in lime zest. Pour filling into crust.
Bake at 325°F for 30 minutes or just until set.
Cool to room temperature. Refrigerate for at least 3 hours before serving. Keep leftovers in refrigerator up to 4 days.