Peanut Butter & Jam Thumbprints

Ingredients

• 1 cup smooth peanut butter
• 1/2 cup margarine
• 1/2 cup firmly packed brown sugar
• 1/4 cup granulated sugar
• 1 egg
• 1/2 tsp vanilla extract
• 1 cup all-purpose flour
• 1 tsp baking soda
• 1/4 tsp salt
• 1/2 cup raspberry jam