Dissolve the yeast and 1 teaspoon of sugar in warm water in a small bowl.
Set aside for approximately 8 to 10 minutes, or until the sugar and yeast are dissolved.
Combine the flour, 1/2 cup sugar, and kosher salt in a stand mixer fitted with a dough hook.
Reduce the mixer's speed to low to incorporate the ingredients.
Add the vegetable oil and yeast mixture to the flour and mix on medium-low speed for approximately six minutes, or until the dough is smooth.
Spray a large bowl lightly with cooking spray, place the dough in the bowl, cover it with plastic wrap, and let rise in a warm place for one hour, or until the dough has doubled in size.
Meanwhile, preheat the oven to 425 degrees Fahrenheit.
Two baking sheets are lined with parchment paper.
Turn the dough out onto a lightly floured surface and divide it into sixteen equal portions (about 1 ounce each).
Twist each rope into a traditional pretzel shape by rolling it into a 24-inch-long rope.
Stir the baking soda and boiling water together in a large heat-resistant bowl until the soda is completely dissolved.
Each pretzel should be dipped in the mixture of soda and water, then placed on one of the prepared baking sheets pans, leaving 1 1/2 inches between each pretzel.
Sprinkle flaky salt over the pretzels.
Bake for about 8 to 9 minutes, or until golden brown.
Brush with melted butter on each pretzel and serve immediately.