Saltine Cracker Toffee is a classic butter toffee on top of crunchy, buttery crackers. Make this classic holiday treat in just 20 minutes using 5 ingredients!
Preheat oven to 400 degrees. Line a 9x13 baking dish with parchment paper, carefully folding the edges so you can easily lay the crackers flat.
Line baking dish with crackers. If using Ritz, the circles won't line up perfectly, so break a few into halves and do a second layer to cover holes. It doesn't need to look pretty.
In a medium saucepan, heat butter and brown sugar over medium heat, stirring frequently until fully combined and smooth. Allow it to reach 285 degrees using a candy thermometer and then let is stay at this heat for 3-4 minutes.
Remove from heat and whisk in vanilla. Mixture will spit a little, this is normal. Pour over crackers while hot. It will start to set immediately.
Bake for 8 minutes. Remove and turn off oven.
Sprinkle top with chocolate chips, then return to the warm oven (oven is off, but warm). Allow to sit in warm oven for 1-2 minutes or until chocolate starts to glisten slightly. Using an offset spatula to smooth it out.
Using an offset spatula to smooth it out.
Remove, sprinkle with fleur de sel, and allow to cool slightly before putting the fridge to set. This will take several hours before toffee is easily cut.
Remove parchment paper and cut into squares.
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