Preheat oven to 350°F. Have an ungreased half-sheet pan (roughly 12 x 17 inches) ready for the cookie brittle.
Add sugar and vanilla extract to melted and cooled butter. Whisk together until the mixture thickens. Add salt and flour. Stir with a wooden spoon or spatula just until combined.
Add the mini chocolate chips and toasted pecan pieces; stir to combine. Pour onto an ungreased rimmed baking sheet. Press into a thin, even layer. (See Tip 2)
Bake in preheated 350°F oven for 24 to 25 minutes or until a light golden brown all over. Remove from oven and cool completely. Break into bite-sized pieces. Store in an airtight container for up to a week.
Yield: 14 servings.
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Tips/Notes
To toast the pecans, spread in a single layer on a baking sheet. Bake in a preheated 350°F oven for 8 to 10 minutes. Watch carefully to ensure that the pecans do not burn.
Be sure to compact the brittle dough when pressing it into a thin layer to ensure that the cookie brittle stays together when cooked.