Preheat the oven to 350°F. Line a 9×13” pan with parchment and spray with baking spray.
In a large bowl, mix the vanilla cake mix, melted butter, egg, and vanilla until a thick dough forms. Press it evenly into the bottom of the pan.
In a separate bowl, beat the cream cheese until smooth. Add eggs, milk, matcha, vanilla, and powdered sugar. Beat until fully combined and fluffy. If it isn’t smooth, that’s okay, it’ll bake fine!
Pour the matcha filling over the crust and smooth the top.
Warm the strawberry jam slightly if needed, then drop spoonfuls over the top. Use a knife or skewer to swirl it gently into the filling.
Bake for 40–45 minutes, or until the center is just set but still slightly jiggly. Don’t over bake—it’ll continue to firm as it cools.
Cool completely before slicing. I like to let it set in the fridge overnight. Top with strawberries and whipped cream.