Jam Cupcakes With Chocolate Frosting

Ingredients

• 1 cup (2 sticks) unsalted butter, room temperature, plus more for pan
• 1 1/2 cups all-purpose flour, (spooned and leveled), plus more for pan
• 1 1/2 teaspoons baking powder
• 1 teaspoon salt
• 3/4 cup granulated sugar
• 2 large eggs, room temperature
• 1 1/2 teaspoons pure vanilla extract
• 1/2 cup plus 2 tablespoons whole milk
• 1 cup confectioners' sugar
• 1/4 cup unsweetened cocoa powder
• 1/4 cup seedless raspberry jam
• 12 raspberries, for garnish