Bakery style choco chip muffins

1 cup milk

1/4 cup vinegar

2 1/2 cups all-purpose flour

1 tbsp baking powder

1 tsp baking soda

1/2 tsp salt

1 cup granulated sugar

1/2 cup butter, melted

2 larges eggs

1 tbsp vanilla

1 1/2 cups miniature chocolate chips

optional: sanding sugar for sprinkling on top

choco chip Shavuot