Lemon Poppy Seed Muffins

Ingredients:
½ cup of Unsalted Butter, softened at room temperature
¾ cup of Plain Yogurt
½ cup of Granulated Sugar
2 Tsp of Baking Powder
½ tsp of Baking Soda
½ tsp of Salt
2 cups of All Purpose Flour
3 Tbsp of Poppy Seeds
1 Envelope of Vanillina or 1 tsp of Vanilla Extract
2 Eggs
Zest of 1 Large Lemon or 2 small lemons
Juice of One Lemon

For the Glaze
1 cup of Powdered Sugar
About 1 Tbsp of Lemon Juice