Step 1Heat the oven to 350 degrees. Spread the pecans out on a rimmed baking sheet. Toast the pecans until darkened and aromatic, 6 to 8 minutes, being careful not to burn. Remove and cool; coarsely chop.
Step 2While the pecans are cooling, brown the butter: Place the butter in a wide pan and heat over medium-low heat until the milk solids are nicely browned and the butter has a toasted, nutty flavor, 4 to 5 minutes. Remove from heat and pour into a mixing bowl. Set aside.
Step 3Prepare your 9-inch by 9-inch baking pan by spraying it with non-stick spray, lining with a piece of parchment paper the size of the bottom of the pan, and then spraying once again to coat the paper and the sides of the pan.
Step 4In a medium bowl, whisk together the flour and salt in a large bowl. In a separate large mixing bowl, whisk together the eggs and vanilla.
Step 5Carefully whisk the sugars in with the warm butter, mixing well to combine. Slowly whisk the butter mixture into the beaten eggs and vanilla, mixing well until fully incorporated.
Step 6Add the flour mixture and blend it in until there are just a few pockets of dry flour remaining, careful not to overmix. Add the pecans and fold them in.
Step 7Pour the batter into the prepared pan. Bake the blondies for 12 minutes, then rotate the pan. The blondies will be done when the top is glossy and crackling a little, and the center of the blondies feel slightly firm when pressed gently on top, another 20 to 25 minutes. They will be somewhat soft, but not gooey in the center. Remove from heat and cool on a rack. While the blondies are baking, prepare the glaze.
Step 1While the blondies are baking, prepare the glaze: In a heavy-bottomed saucepan, combine the sugar, butter, cream, honey and corn syrup. Bring to a boil over high heat and boil for 1 minute. Remove from heat and set aside to cool until both the blondies and sauce are cooled. This makes a generous 2 cups sauce, more than is needed for the blondies; the sauce will keep, covered and refrigerated, up to 2 weeks.
Step 2Cut the brownies into 9 even squares. Dip the top of each brownie in the glaze. Sprinkle each brownie with a little sea salt, and garnish with the chopped toasted pecans. Serve as they are, or store them covered once the glaze has dried. The blondies will keep for up to 4 days in a covered container, and up to 2 weeks frozen in a sealed container.