In a large mixing bowl, whisk together the all-purpose flour, granulated sugar, baking powder, salt, and ground cinnamon until well combined. In a separate bowl, blend the milk, egg, and vegetable oil until smooth. Gradually pour the wet ingredients into the dry mixture, stirring gently until just combined—be careful not to overmix! Let the batter rest for about 10 minutes.

Preheat your oven to 350°F (175°C) and prepare a donut pan by greasing it lightly with cooking spray or butter. This step is crucial to ensure your Vampire Donuts come out easily and maintain their shape.

Once the batter has rested, transfer it into a piping bag or a ziplock bag with one corner snipped off. Pipe the batter into the prepared donut pan, filling each mold about halfway to allow for rising. Add a teaspoon of raspberry jam in the center of each donut mold, then cover with more batter to conceal the filling.

Carefully place the filled pan into the preheated oven and bake for 10-12 minutes, or until the donuts are golden brown and a toothpick inserted into the batter comes out clean. Keep an eye on them—when they spring back slightly when touched, they’re ready!

While the donuts are cooling, prepare the glaze by whisking together the powdered sugar, milk, and a few drops of red food coloring in a medium-sized bowl until smooth. Adjust the consistency by adding more milk for a thinner glaze or more sugar for thickness.

Gently remove the cooled donuts from the pan and place them on a wire rack or a parchment-lined baking sheet. Drizzle or dip each donut in the vibrant red glaze, allowing any excess to drip off.

Allow the glaze to set for about 10-15 minutes before serving your Vampire Donuts. Arrange them on a festive platter and watch as your guests are drawn in by their enchanting appearance.