Preheat oven to 375 F. Line a 9x13 pan with parchment paper.
Combine butter and sugar.
Beat eggs, caramel, and syrup into the sugar mix.
Add flour, baking soda, and salt, and mix until smooth.
Spread into the lined pan and bake for 20-30 minutes, until a toothpick inserted into the center comes out clean.
Cool completely and cut into squares.
Notes
You can use homemade or store-bought salted caramel sauce. You can also use regular caramel sauce and add 1 teaspoon of sea salt for every cup of caramel sauce.