The BEST Strawberry Muffins - Pizzazzerie

Ingredients

• 1 cup butter (softened)
• 1 ½ cups sugar
• 1 teaspoon vanilla extract
• 1/3 teaspoon lemon extract
• 3 large eggs
• 3 cups flour (all-purpose)
• 1 teaspoon salt
• 1 teaspoon cream of tartar
• 2 teaspoons baking powder
• 1 cup strawberry jam
• 2 cups strawberries (finely diced)
• ½ cup sour cream