01 - 
                Place flour, sugar, and salt in a stand mixer fitted with a dough hook.
              
              
              
                02 - 
                Warm milk in microwave-safe container for 30 seconds until 40 to 43 degrees Celsius.
              
              
              
                03 - 
                Stir yeast, melted butter, and beaten egg into warm milk mixture.
              
              
              
                04 - 
                Pour wet ingredients into dry and mix on medium speed for 10 minutes until sticky dough forms.
              
              
              
                05 - 
                Grease hands and a large bowl with vegetable oil, form dough into a ball, coat evenly with oil, cover, and let rise until doubled, 1 to 2 hours.
              
              
              
                06 - 
                Line a baking sheet with parchment paper and spray with nonstick spray.
              
              
              
                07 - 
                Punch down dough, transfer to a lightly floured surface, and press into a 15 by 36 cm rectangle using hands or rolling pin.
              
              
              
                08 - 
                Sprinkle ground cinnamon evenly over dough and rub in by hand.
              
              
              
                09 - 
                Roll dough tightly from the long side to form a log, then seal the edge with water to create a seam. Keep seam side up.
              
              
              
                10 - 
                Cut roll into 1.25 cm (thin) or 2.5 cm (thick) slices using dental floss or a sharp knife.
              
              
              
                11 - 
                Place slices cut side up on prepared sheet, spacing 5 cm apart for baking or 1.3 cm for frying. Spray with nonstick spray, cover, and let rise for 30 minutes in a warm place.
              
              
              
                12 - 
                Preheat oven to 175 degrees Celsius. Bake for 15 to 18 minutes until edges turn golden brown. Remove and cool 10 to 20 minutes before glazing.
              
              
              
                13 - 
                Heat vegetable oil to 160 degrees Celsius. Fry buns one or two at a time, flipping when golden brown, until both sides are evenly browned. Drain on paper towels and cool for 5 to 10 minutes.
              
              
              
                14 - 
                Whisk together melted butter, powdered sugar, milk, and vanilla extract until smooth.
              
              
              
                15 - 
                Dip warm buns in glaze, tapping wrist to remove excess. Place on wax paper and allow glaze to set.