2 to 2½tablespoonscold water30–45ml, more if needed
For the Crust & Crumble Topping
1cupall-purpose flour125g
1teaspoonbaking powder
¼teaspoonground cinnamon
1cupold-fashioned oats90g
¼teaspoonsalt
½cupunsalted butterat room temperature (113g)
½cuplight brown sugarpacked (100g)
½teaspoonvanilla extract
For the Cheesecake Filling
16ouncesfull-fat cream cheese454g
½cupGreek yogurt or sour cream125g
½cupgranulated sugar100g
2medium eggs
1teaspoonvanilla extract
1tablespoonlemon juice15ml
Extra
½cupfresh blueberries70g, for scattering on top
Instructions
Make the Blueberry Swirl
Add the blueberries, sugar, cornstarch, lemon juice, and water to a small saucepan.
1 cup fresh or frozen blueberries, 1 tablespoon granulated sugar, 1 teaspoon lemon juice, 1 teaspoon cornstarch, 2 to 2½ tablespoons cold water
Cook over medium-low heat, stirring constantly, for about 5–6 minutes.
As the mixture heats, the berries will soften and release their juices. Mash a few with your spoon or spatula to help them break down. If the mixture looks too dry at any point, add a little water - just enough to help everything come together.
Keep stirring until the mixture thickens into a jam-like consistency.
Transfer to a bowl and put it in the refrigerator while you prepare the rest. It will thicken a bit more as it chills.
Make the Crust and Crumble Topping
Preheat the oven to 350°F / 180°C and line your pan with parchment paper, leaving some overhang on the sides for easy removal later.
In a medium bowl, whisk together the flour, baking powder, cinnamon, oats, and salt.
1 cup all-purpose flour, 1 teaspoon baking powder, ¼ teaspoon ground cinnamon, 1 cup old-fashioned oats, ¼ teaspoon salt
In another large bowl, beat the softened butter and brown sugar together with an electric mixer on medium-high speed until smooth and well combined (about 1 minute).
½ cup unsalted butter, ½ cup light brown sugar
Scrape down the sides of the bowl and mix in the vanilla extract.
½ teaspoon vanilla extract
Add the dry ingredients to the butter mixture and beat on low to medium speed just until everything is combined. The mixture will be crumbly—that’s exactly what you want!
Lightly press a little more than half of the mixture into the bottom of your prepared pan. Use your hands or the bottom of a glass to gently flatten it out, but don't pack it too tightly.
Bake the crust for 7–8 minutes, then remove from the oven (but leave the oven on).
With the remaining crumble mixture, squeeze together a few clumps using your fingers. These will become your crumble topping. Set aside.
Make the Cheesecake Filling & Assemble
In a clean bowl, beat the cream cheese until smooth and creamy (about 1–2 minutes). Don’t overmix.
16 ounces full-fat cream cheese
Add the sugar and mix until just combined.
½ cup granulated sugar
Add the Greek yogurt (or sour cream), eggs, vanilla, and lemon juice. Mix again until just combined.
½ cup Greek yogurt or sour cream, 2 medium eggs, 1 teaspoon vanilla extract, 1 tablespoon lemon juice
Pour the cheesecake filling over the pre-baked crust and smooth it out evenly.
Take the blueberry swirl out of the fridge, give it a quick stir, and drop spoonfuls of it over the cheesecake filling, leaving a bit of space between each one so they're not touching.
Use a skewer, knife, or toothpick to gently swirl the blueberry mixture into the cheesecake, being careful not to touch the crust.
Evenly scatter the fresh blueberries on top (I like to place them one by one to space them out nicely).
½ cup fresh blueberries
Sprinkle the reserved crumble mixture over the top.
Bake for 30–35 minutes, or until the edges are lightly browned and set. The center should have a slight jiggle when you gently shake the pan.
Turn off the oven and leave the door slightly open (a wooden spoon in the door works well). Let the cheesecake cool inside the oven for 30 minutes.
Remove from the oven, let it come to room temperature, then refrigerate for at least 3 hours (or overnight) to fully set.
Once chilled, lift the bars out using the parchment overhang and slice into squares or bars.