01 -
Preheat the oven to 350°F (175°C). Line a 9×13 inch pan with parchment paper, leaving an overhang on the long sides for easy removal, and spray the short sides with baking spray.
02 -
In a medium bowl, whisk together the flour, baking soda, cinnamon, and salt. Set aside.
03 -
In a large mixing bowl, cream together the butter, light brown sugar, and granulated sugar for 2-3 minutes until light and fluffy. Add the eggs, one at a time, mixing well after each, then stir in the vanilla extract.
04 -
Gradually mix the dry ingredients into the wet ingredients until just combined. Fold in the oats evenly. Avoid overmixing to maintain the soft texture of the cookie base.
05 -
Press half of the cookie dough mixture into the prepared pan, smoothing into an even layer. Set aside the remaining dough for the topping.
06 -
In a medium bowl, beat the cream cheese and sugar until smooth and free of lumps. Beat in the egg yolk first, then add the egg white until well incorporated. Fold in the melted white chocolate chips.
07 -
Spread the cheesecake mixture evenly over the cookie base. Distribute the chopped strawberries and blueberries across the cheesecake layer. Break apart the reserved cookie dough and scatter it over the top to create a streusel-like topping.
08 -
Bake in the preheated oven for 25-30 minutes, or until the topping is golden brown and the center is set with a slight jiggle. Cool completely at room temperature, then refrigerate until firm.