In a large bowl, cream butter and sugar. In a separate bowl, beat together milk, sour cream, egg, and almond extract, then stir into butter mixture. Mix together remaining ingredients, then add to butter and milk mixture and stir until just combined.
Line 12 standard muffin tins and fill with batter 2/3 full. Sprinkle with sliced almonds if desired. Bake at 375 for 18-20 minutes or until a toothpick comes out clean.
Adapted from Wonky Wonderful