The Best Raspberry Yogurt Muffins in The World

I used to go to a coffee shop every day when The Girl was a baby and I would get one of these muffins. They were SO good.
Then we moved and I missed my delicious muffins, until one day I magically figured out the recipe and lived happily ever after.

2 cups all-purpose flour
3/4 cup sugar
2 tsp baking powder
1/2 tsp salt
1 egg
1 cup raspberry yogurt (which I make by mixing raspberry jam and yogurt together, but whatever)
1/2 cup butter, melted
1 tsp vanilla extract
Rasberry jam
Combine the flour, sugar, baking powder and salt in a large bowl.
In another bowl, whisk the egg, yogurt, vanilla and butter; stir into the dry ingredients.
Fill each muffin tin with a tablespoon or two of batter - then put 1/2 tablespoon of jam in each cup; cover with batter. Bake in a 350 degree oven for 30-35 minutes.Yum.