You asked for it (or at least a couple of you did on Facebook and Instagram)
1 lb. unsalted butter
3 Tbsp. water
2 cups sugar (400 g)
1/2 tsp. salt
1 tsp. vanilla
12 oz finely chopped semi or bittersweet chocolate (can also substitue 1 12oz bag of your favorite chips, I use Trader Joe's Pound Plus 72% Dark Chocolate Bar)
8 oz crushed mini pretzels (I use these) - you can also try crushed peppermints, flaky sea salt, toasted nuts, whatever suits your fancy.
In a large skillet, melt butter, water, sugar, and salt over medium high heat. Stir constantly and rapidly with wooden spoon. Boil, stirring rapidly, until mixture turns a deep golden tan. Quickly remove from heat so as not to burn the mixture. Stir in the vanilla (it will splatter and bubble up).
Pour mixture into rimmed cookie sheet or baking pan, lined with foil (my go-to pan for this is 10x15). Allow to cool slightly, about 5 minutes, then sprinkle evently with chopped chocolate. When chocolate looks glossy, spread chocolate evenly with an offset spatula, and sprinkle with pretzels. Press pretzels into chocolate using the back of a large spatula.
Cool 8 to 12 hours at room temp, then break toffee into chunks.
Note: I've made a couple times recently and put the sheet in the fridge to cool down more quickly. Don't do this! The chocolate and toffee cool down at different times and then the layers separate from each other when you break it.
Step by step photos to come...