01 -
Heat the oven to 350°F (175°C). Grease a 9x13-inch baking pan and line it with parchment if you want easier lifting.
02 -
Beat the cake mix, eggs, milk, oil, sour cream, and vanilla in a large bowl for about 2 minutes, until smooth. Spread the batter evenly in the prepared pan.
03 -
Beat the cream cheese, sugar, egg, and vanilla until creamy and thick. Dollop it over the cake batter, then swirl gently with a knife.
04 -
Bake for 34-40 minutes, until the edges are set and a toothpick inserted into the cake portion comes out with moist crumbs. Cool completely in the pan.
05 -
Combine strawberries, sugar, lemon juice, cornstarch, and water in a saucepan. Simmer over medium heat for 5-7 minutes, stirring often, until glossy and thickened. Cool to room temperature.
06 -
Beat the cream cheese, powdered sugar, milk, and vanilla until smooth. Add the milk slowly until the drizzle falls in thick ribbons.
07 -
Spread the cooled strawberry glaze over the cake. Drizzle with the cream cheese icing, then chill for at least 1 hour before slicing.