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1
Preheat oven to 350 degrees F (175 degrees C). Grease a 9x13-inch baking dish with cooking spray.
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2
Beat white sugar, butter, 1 teaspoon vanilla extract, and pinch of salt together in a bowl until smooth; add flour and stir until dough forms. Press dough into the bottom of the prepared baking dish.
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3
Bake in the preheated oven until edges are lightly brown, 15 to 17 minutes. Cool crust completely.
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4
Whisk brown sugar, corn syrup, eggs, remaining vanilla extract, and 1/4 teaspoon salt together in a bowl; add pecans and stir to combine. Pour brown sugar mixture over cooled crust.
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5
Bake in the oven until golden brown and filling is set, 25 to 30 minutes. Cool to room temperature; cut into 36 bars. Place bars in refrigerator until cold, about 1 hour.
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6
Melt the chocolate chips in a microwave-safe glass or ceramic bowl in 30-second intervals, stirring after each melting, for 1 to 3 minutes (depending on your microwave). Set cold bars on waxed paper and drizzle melted chocolate over the top.
