-
Preheat the oven to 400° F/204°C. Grease a muffin pan, or line with paper liners; set aside.
-
Mix the soy milk and vinegar; set aside.
-
In a large bowl combine the flour, baking powder, cinnamon, sugar, and salt; set aside.
-
In another bowl, beat the eggs, soy milk with vinegar, oil, and vanilla.
-
Stir wet ingredients into dry ones just until combined, make sure not to over mix. Fold in chopped apple.
-
Fill prepared muffin tin cups two-thirds full.
-
For the topping:
-
In a small bowl combine sugar, flour, cinnamon, and oil. Mix until mixture resembles coarse crumbs. Sprinkle a scant teaspoonful over each muffin.
-
Bake for 18-20 minutes or until a toothpick comes out clean. Cool for 5 minutes before removing from pans to wire racks. Serve warm.