Fabulous flax muffins

Ingredients

• 1 1/2 cups ground flaxseed
• 1/2 cup whole-wheat flour
• 1/2 cup all-purpose flour
• 1/2 cup brown sugar
• 4 tsp baking powder
• 1 tsp cinnamon
• 1/2 tsp nutmeg
• 1/2 tsp salt
• 1 1/2 cups milk , preferably skim
• 2 tbsp olive oil
• 1 egg
• finely grated orange zest , from 1 orange
• 1/2 tsp vanilla
• 1 1/2 cups raisins , preferably sultana