-
1
Preheat the oven to 350.
-
2
Line a 9-by-13-inch baking pan with parchment paper or foil, allowing 2 inches of overhang on the 2 long sides.
-
3
In a medium saucepan, combine the condensed milk with 2 cups of the chocolate chips and stir over moderately low heat until the chocolate is melted.
-
4
Remove from the heat.
-
5
Whisk in 1 1/2 teaspoons of the vanilla and let cool completely.
-
6
In a medium bowl, whisk together the flour, baking soda and salt.
-
7
In a large bowl, using a handheld mixer, beat the 2 sticks of butter with the brown sugar and the 3/4 cup of granulated sugar at medium speed until fluffy, about 1 minute.
-
8
Beat in the eggs and the remaining 2 teaspoons of vanilla.
-
9
At low speed, beat in the flour mixture until just incorporated.
-
10
Stir in the remaining 2 cups of chocolate chips.
-
11
Press the cookie dough in the prepared pan in an even layer.
-
12
In a bowl, toss the pretzels with the melted butter and the remaining 1 tablespoon of granulated sugar.
-
13
Spread the melted chocolate mixture over the cookie dough and sprinkle evenly with the pretzels.
-
14
Bake for about 45 minutes, until set and the pretzel topping is golden brown.
-
15
Transfer the pan to a rack and let the bars cool completely.
-
16
Run the tip of a knife around the side of the pan and lift the bar out using the parchment paper.
-
17
Cut into 24 bars, discard the parchment paper and serve.
