Fudgy Rocky Road Blondies

0 Preheat oven to 350°F. Line a 9 x 13 inch baking pan with parchment paper and set aside.
1 In a large microwave-safe bowl, melt the butter. Let cool slightly.
2 Whisk the sugar into the melted butter until smooth and glossy.
3 Whisk in the eggs, one at a time, until fully incorporated.
4 Add the flour and salt and stir just until combined. Do not overmix.
5 Fold in most of the s’mores baking chips, mini marshmallows, and walnuts, reserving a small handful of each for the top.
6 Spread the batter evenly into the prepared pan. Sprinkle the remaining chips, marshmallows, and walnuts over the surface and gently press them in.
7 Bake for 28–32 minutes, until the edges are set and a toothpick inserted in the center comes out with moist crumbs.
8 Cool completely in the pan before slicing. Chill briefly for cleaner cuts if desired.