1. Mix together the flour and baking powder. Set aside.
2. Whisk together the eggs, brown sugar, vanilla, margarine, and milk.
3. Mix together the liquid and dry ingredients.
4. Add the raspberries and mix gently.
5. Pour the mixture into the muffin cups. Bake for 30 minutes at 350F. Using a toothpick, check the centre to see if it is cooked through.