In a large bowl, combine the flour, yeast, salt, and cornstarch. Whisk to combine. Make a well in the center of the bowl, then add the melted butter, egg, avocado oil, milk, and raw honey. Stir with a wooden spoon to combine. When the mixture becomes thick and sticky, start mixing by hand. Pinch to incorporate the ingredients.
Begin kneading the dough in the bowl, by hand, until it becomes fairly smooth, and forms a ball. This should take about 3 minutes of kneading. Cover the bowl with plastic wrap, and let the dough rise at room temperature for about 1.5 hours or until it has doubled in volume.