Here's a tutorial for you:
Apple and Blueberry MuffinsMakes: 18 muffins
Preparation time: 30 mins (more if you want to take photos, like I did)
Cooking time: 20 mins
Step 1. Gather the ingredients and pre-heat the oven to 180 degrees Celsius (or 356 degrees Fahrenheit).
You will need - 175g melted butter, 2 1/2 cups self raising flour, 3/4 of a cup of brown sugar, 2 green apples, a teaspoon of vanilla essence, 125g blueberries, 4 eggs and 1 1/4 cups of milk.
Step 2. Core, peel and chop the apples.
Step 3. Mix together in a bowl with electric beaters the flour, butter, sugar, vanilla, milk and eggs.
Step 4. Add the blueberries and chopped apple and stir in using a mixing spoon.
Step 5. Scoop the mixture into individual muffin cases.
Step 6. Put them in the oven and sit back and wait for 20 minutes! Or you can do the washing up like I did...
Step 7. After 20 minutes in the oven, the muffins should be ready to enjoy. Leave them to cool for a few minutes though...
I hope this tutorial works for you and if you do end up making some of these yummy muffins, please let me know how they went!