I can't wait to try the muffin recipe...in answer to the original question....
This may sound odd, but check out the recipes on the Food Network website (www.foodnetwork.com) under "Paula's Home Cooking". Paula Deen is a southern style chef and I think she puts butter in practically everything. She has a recipe for cheesy-mac (this week) that has butter, cheese and sour cream in it:
4 cups cooked elbow macaroni, drained
2 cups grated cheddar cheese
3 eggs, beaten
1/2 cup sour cream
4 tablespoons butter, cut into pieces
1/2 teaspoon salt
1 cup milk
Preheat oven to 350 degrees F. Once you have the macaroni cooked and drained, place in a large bowl and while still hot and add the cheddar. In a separate bowl, combine the remaining ingredients and add to the macaroni mixture. Pour macaroni mixture into a casserole dish and bake for 30 to 45 minutes. Top with additional cheese if desired.
You can look up recipes from past shows. It may take a while to find what you want, but she really is the highest-fat chef I have ever seen. There is nothing low about her cooking! She also tends to use some ready-made items to make cooking easier.
Hope this is of some help.