Classic Vegan Waffles

0 In a large bowl, make the buttermilk by whisking together milk and apple cider vinegar. Let this mixture sit and thicken up for at least 5 minutes.
6 Add the sugar, melted butter and vanilla extract to the buttermilk and whisk to combine. 
1 In a separate bowl, sift together flour, baking soda and salt. 
2 Add the sifted, dry ingredients to the buttermilk mixture. Mix until just combined, do not overmix! It should be a thick, semi-lumpy batter. If you're adding anything like blueberries or chocolate chips, do it now and stir once more to distribute. 
3 Set your waffle maker to your preferred cooking time (I have mine set at 3.5). Depending on the size of your waffle maker, scoop 1/2 cup - 1 cup of batter onto your waffle maker. Close, rotate, and cook until the steam stops coming from the waffle maker. The steam should stop right around when your waffle maker says it's ready, but sometimes it doesn't stop for another minute or two. 
4 Repeat until all the batter has been used. 
5 Serve immediately and with your favorite toppings.