Peanut Butter Muffins

-Preheat oven to 400°. -Grease twelve 2 1/2 inch muffin-pan cups. -In large bowl with fork, mix flour, sugar, baking powder and salt. -In medium bowl, beat milk, peanut butter, salad oil and egg until smooth. -Stir peanut butter mixture into flour mixture just until moistened. (Do not overmix or muffins will be tough) Batter should be lumpy. -Stir in raisins. -Spoon batter into prepared muffin-pan cups, filling each cup about 2/3 full. -Bake muffins for 20 minutes or until well risen and golden, and toothpick inserted in center of a muffin comes out clean and dry.