Gooey Lemon Butter Cake

Ingredients:

For the bottom layer (crust):

• 1 box yellow cake mix (or 2 cups all-purpose flour + 1 tsp baking powder + 1/2 cup sugar if from scratch)
• 1/2 cup (115g) unsalted butter, melted
• 1 large egg

For the gooey lemon layer:

• 8 oz (225g) cream cheese, softened
• 2 large eggs
• 1/2 cup (115g) unsalted butter, softened
• 2 tbsp lemon juice (freshly squeezed)
• 1 tbsp lemon zest
• 3 cups (360g) powdered sugar
• 1/2 tsp vanilla extract (optional)

Instructions: 

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