Salted Caramel Blondies

Name: Salted Caramel Blondies
Prep time: 30 min
Cook time: 35 min
Total time: 1 h 5 min
Cuisine: American
Ingredients: 113 grams unsalted butter, softened (1/2 cup / 1 stick); 1 egg; 200 grams light brown sugar (1 cup, packed); 2 tablespoons molasses, or black treacle; 2 tablespoons whole milk; 1 teaspoon vanilla bean paste; 1/2 teaspoon kosher salt; 145 grams all purpose flour (1 1/8 cup); 1/2 teaspoon baking powder; 125 milliliters whipping cream (1/2 cup); 45 grams unsalted butter (3 tablespoons); 1/4 teaspoon coarse sea salt (plus more for sprinkling); 140 grams granulated sugar (2/3 cup); 50 milliliters water (1/4 cup); 30 grams corn syrup, or liquid glucose (1 tablespoon)