In a mixing bowl combine milk, vinegar and let it sit for 10 minutes until it is slightly curdled
Add sugar, oil and vanilla extract.Mix with a whisk until combined.
Add all the dry ingredients ( flour, baking powder, baking soda and salt) and Mix it into the liquid ingredients until fully combined.
Fold blueberries into the batter and Cover.
Let the batter rest at room temperature for 30 minutes.
Preheat the oven to 400℉(200℃).
Line a muffin tray with muffin liners. Fill each liner with muffin batter until it is almost full to the rim.
Top it with spoonful of chilled or frozen crumble topping
Bake at 400℉ (200℃) for 10 minutes and reduce the temperature to 350f (175C)and bake for 8-10 min approximately, baking time may vary depending on size of the muffins.
Allow to cool on a wire rack for 10-15 min and enjoy!
Store at room temperature in an airtight container for 2-3 days.