Hazelnut Muffins with Strawberry Jam | Williams Sonoma

Ingredients

• 1 1/2 cups all-purpose flour
• 1/2 cup sugar
• 1 1/2 tsp. baking powder
• 1/4 tsp. baking soda
• 1/4 tsp. salt
• 8 Tbs. (1 stick) unsalted butter, melted
• 1 cup sour cream
• 1 egg
• 1 tsp. vanilla extract
• 1/4 cup finely chopped toasted hazelnuts
• About 1/2 cup strawberry jam