Preheat the oven to 450F
In a large measuring cup, whisk together the almondmilk and apple cider vinegar and allow to sit for 5 minutes to create homemade buttermilk
In a large bowl, whisk together the flour, sugar, baking powder, baking soda, and salt
Add the blueberries to the flour mixture and toss until evenly dispersed
In a separate medium bowl, whisk together the homemade buttermilk, yogurt, and vanilla
Make a well in the center of the flour mixture and pour in the wet mixture
Use a wooden spoon to stir until just combined, the dough will be sticky and wet
Add the butter to a 10.5x7.5 inch or 9x9 inch baking pan and place in the oven until fully melted
Mix the brown sugar and cinnamon together in a small bowl
Remove the pan from the oven and pour or drop the biscuit dough into the hot pan
Spread the dough out evenly
Using a knife, score the unbaked dough into 6 or 8 equal rectangles or squares, dragging the butter down with the score
Sprinkle the cinnamon brown sugar all over the tops
Bake at 450F for 25-30 minutes until deeply golden and bubbling
Remove from the oven and rest for at least 5-10 minutes
Serve warm and enjoy
