Kue Selai Kacang Gula Merah yang Lembut dan Renyah

Bahan-bahan (16 porsi)

• 1 stick (1/2 cup) salted butter, at room temperature
• 1/2 cup dark or light brown sugar
• 1/4 cup real maple syrup
• 1/2 cup creamy peanut butter
• 1 large egg, at room temperature
• 1 teaspoon vanilla extract
• 1 1/4 cups all-purpose flour
• 3/4 teaspoon baking soda
• 1/4 teaspoon kosher salt
• 8 -12 ounces semi-sweet or milk chocolate, melted
• 1/4 cup cane sugar, for rolling ((optional))
• flaky sea salt, for sprinkling