Gluten-free Pumpkin Doughnut Holes (a.k.a. Mini Muffins)

Ingredients

• 1/2 stick canned sugar
• 1 stick unsalted butter
• 1 cup canned unsweetened pumpkin puree
• 2 Tbsps buttermilk
• 1 large egg
• 1 1/3 cups gluten-free flour
• 0.06 xanthan gum
• 1/2 tsps salt
• 1/2 tsps baking soda
• 1 1/2 tsps gluten-free baking powder
• 1/4 tsps ground nutmeg
• 1/8 tsps ground cinnamon
• 1 stick butter
• 1 cup canned sugar
• 3 Tbsps ground cinnamon