Brudgies / Frownies

Is it a brownie? or is it Fudge? You decide.

This is adapted from a Chocolate Chip Blondie recipe.

SALTY CHOCOLATE SQUARES
1 stick butter (I used unsalted)
1 cup dark brown sugar
1 T light Karo (corn syrup)
1/2 tsp salt (less if using salted butter)
2 eggs
1 tsp vanilla extract
1/4 tsp each baking soda and cream of tartar
1/2 cup unsweetened cocoa
2/3 cup flour
1 cup walnuts
2 oz dark chocolate
Seasalt for topping

Toast the walnuts on a pan in a 350° oven for 10 minutes. Turn them out onto a cutting board and chop finely. Melt the butter with the brown sugar, salt, and Karo in a saucepan on the stovetop. Stir with a wooden spoon until the sugar is completely dissolved. Let it cook for about 5 minutes until it is thick and smooth. Stir in the eggs, vanilla, baking soda and tartar, the cocoa and flour. Stir in the walnuts. Line an 8" square pan with a piece of 12" x 8" parchment paper, letting the flaps extend. Pour/spread the mixture into the pan and bake for about 22 minutes. It may look underdone but will firm up when cooled. While it is still hot, shave dark chocolate over the top and let it melt. Sprinkle on seasalt. Cool in the pan and cut into 1" squares. Use a plastic knife (the brownies won't stick to it).