Delectable Chewy Gingerbread Bars (Easy 9x13 Bake)

Ingredients

• 3/4 cup (170 g) unsalted butter, melted and cooled for 5 minutes
• 3/4 cup (160 g) packed dark brown sugar
• 1/2 cup (100 g) granulated sugar
• 1/3 cup (110 g) unsulphured molasses
• 1 large egg, room temperature
• 1 large egg yolk, room temperature
• 2 teaspoons vanilla extract
• 2 1/2 cups (315 g) all-purpose flour
• 1 teaspoon baking soda
• 3/4 teaspoon fine salt
• 2 teaspoons ground ginger
• 1 1/2 teaspoons ground cinnamon
• 1/4 teaspoon ground cloves
• 1/4 teaspoon ground nutmeg
• 4 oz (115 g) cream cheese, softened
• 2 tablespoons (28 g) unsalted butter, softened
• 1 1/2 cups (180 g) powdered sugar, sifted
• 1 teaspoon vanilla extract
• Pinch of fine salt
• 1-2 teaspoons milk, only if needed for spreading