Instructions

For Cinnamon Filling:

Stir together all three ingredients in a small bowl until combined. Set aside.

For Cream Cheese Swirl:

In a small bowl, beat the cream cheese and sugar on until smooth. You can use a handheld mixer, whisk, or just a fork.
Add the egg yolk and vanilla. Mix until smooth and creamy. Set aside.

For Blondies and Assembly:

Place a rack in the center of the oven and preheat oven to 350 degrees F. Grease an 8 or 9-inch square or circular baking pan with nonstick cooking spray . Line with parchment paper, leaving two flaps hanging over the edges of the pan. Lightly grease the parchment paper. Set aside.
In a medium bowl, whisk together browned butter and sugar. Mixture will be grainy. That’s ok.
Whisk in egg and beat by hand until mixture is slightly pale, about 2 minutes. Whisk in vanilla extract.
In a small bowl, whisk together flour, baking powder, baking soda, and salt. Add all at once to the butter and sugar mixture. Stir until just incorporated. Mixture will be fairly thick.

Spread batter into prepared pan. Top with alternating dollops of the cinnamon and the cream cheese mixtures. Once you’ve dolloped on all the fillings, swirl them together with a fork or knife. Bake for 20 to 27 minutes, or until a skewer inserted in the center of the blondies comes out clean.
Remove from oven and allow to cool for at least 20 minutes before removing from the pan and slicing into 9 pieces.