Coklat Marshmallow Graham Batangan

Bahan-bahan (9 porsi)

• 1 cup flour (I used all-purpose)
• 1 cup bread flour
• 1/2 cup rolled oats
• 1 cup dark brown sugar
• 1 teaspoon baking soda
• 1 teaspoon salt
• 1/2 teaspoon cinnamon
• 7 tablespoons butter, chilled
• 1/3 cup maple syrup
• 5 tablespoons milk
• 2 tablespoons vanilla extract
• chocolate pieces and marshmallows