I'm totally in love with these skillet blondies with peanut butter and chocolate chips. They're gooey and fudgy, and just plain amazing. I recommend eating it family-style directly from the cast-iron skillet with some cinnamon or vanilla ice cream on top.
Heat an 8-inch cast iron skillet over low heat for 1 or 2 minutes. Add 14 tablespoons unsalted butter, and when it's half melted, add 1 cup light brown sugar, ½ cup white sugar and mix with a whisk.
Add 2 eggs and mix quickly. Remove the skillet from the heat. Add 2 cups all-purpose flour, 1 teaspoon baking powder, ½ teaspoon salt and ½ teaspoon ground cinnamon. Mix carefully to avoid spilling, and then mix in 1 teaspoons vanilla extract.
Stir in ½ cup salted peanuts, add 6 tablespoons peanut butter in mounds and 4 ounces semisweet chocolate, chopped. Mix it just a few times to marble, but not too much or the chocolate will all melt.
Bake for 35 minutes, or until top is dry but center is still somewhat wet.
Remove from the oven. Serve with scoops of ice cream.