Raspberry-Vanilla Yogurt Muffins

I found this recipe online (don't remember where now) several months ago, and though I've only made these once so far, they were very good. It's been so long since I made them that I don't remember all the changes I made, but I do remember that I used half oat flour and half all-purpose flour, and added some chocolate chips instead of the walnuts. When my roommate found some chocolate chips in her muffin, she referred to them as "hidden treasures." :)

• Ready In: 35 mins
• Serves: 12
• Yields: 12 muffins

Ingredients

• 1⁄4 cup butter
• 1⁄4 cup vegetable shortening
• 3⁄4 cup sugar
• 3 1⁄2-4  ounces vanilla yogurt
• 2  cups flour
• 1 1⁄2 cups raspberries
• 1  tablespoon baking powder
• 1  teaspoon baking soda
• 1  teaspoon nutmeg
• 1  teaspoon vanilla
• 1⁄4 cup ground walnuts (optional)

Directions

1. Cream butter, shortening, and sugar.
2. Add yogurt, vanilla, and berries; mix well.
3. Add flour, nuts, nutmeg, soda, and baking powder.
4. Bake at 375* for about 20 minutes.