Begin by adding your warmed oat milk and yeast to a large mixing bowl. Let sit for 3-5 minutes to make sure the yeast is activated. You will be able to tell if it's bubbling.
Next, add the melted vegan butter, ¼ cup of the Earl Grey lemon sugar, and vanilla to the large mixing bowl. Whisk together to combine.
Once mixed, gradually begin adding in your flour about ½-1 cup at a time. Also, add in ½ teaspoon of salt at this time.
Once all the flour has been added, knead the dough. If using a standing mixer, switch the attachment to the bread hook and knead for 5-10 minutes until elastic. If you are kneading by hand, knead on a lightly floured surface for 10-15 minutes or until the dough is elastic and significantly less sticky. The dough is ready once it can be stretched without tearing and is smooth and tacky but not sticky.
Once the dough is ready, add it to a well-oiled bowl for the first rise. I prefer to coat my bowl in olive oil, but any oil works here.
Cover the bowl of dough with plastic wrap or a towel, place it in a warm place, and let it rise for 1-2 hours or until doubled in size.
I like to test my dough by "poking" it with a finger. If it doesn't bounce back and stays indented, it is ready. It is also important to not “overproof” the dough as it can turn sour from the yeast turning the sugar into alcohol, so do not let the dough sit too long.