Teatime Muffins with Jam - Grit

Ingredients

• 1/4 cup butter, softened
• 4 ounces cream cheese, softened
• 2/3 cup brown sugar
• 2 large eggs, room temperature
• 1 teaspoon vanilla extract
• 1-1/2 cups all-purpose flour
• 1-1/2 teaspoons ground cinnamon
• 1 teaspoon ground allspice
• 1/2 teaspoon freshly grated nutmeg
• 1 teaspoon baking powder
• 1/2 teaspoon salt
• 12 tablespoons Blueberry Rhubarb Jam (or preserve of your choice)