Ingredients

• 1 (15.5 ounce) box strawberry cake mix
• 1/2 cup unsalted butter, melted
• 2 large eggs
• 2 teaspoons vanilla extract, divided
• 3 strawberries, chopped
• 1 1/2 cups confectioner's sugar, or more as needed
• 1/4 teaspoon kosher salt