Salted Chocolate "Twix" Bars

INGREDIENTS

2 cups

all-purpose flour

1/2 cup

light brown sugar

1/4 cup

cornstarch

1/2 tsp

Kosher salt

1 cup

unsalted butter, cold and cut into cubes

2 tbsp

cold water

egg yolks

2 14 ounce cans

sweetened condensed milk

1 cup

light brown sugar

3/4 cup

unsalted butter, cut into cubes

1/4 cup

corn syrup

2 tsp

vanilla extract

bag chocolate (I would have preferred semisweet, but I only had milk chocolate, so I used that and it was great, just sweet)

1 tbsp

fleur de sel, for topping