In a large pot, combine the beer, brown sugar, orange slices, lemon slices, cinnamon sticks, cloves, star anise, and fresh ginger.

Place the pot over medium heat and gradually bring the mixture to a simmer.

Stir the ingredients gently every few minutes to help dissolve the sugar and distribute the spices evenly.

Allow the mixture to simmer for about 20 minutes.

Taste the mulled beer after simmering; if sweeter flavor is desired, add more brown sugar.

If preferred, strain the mulled beer through a fine sieve into a clean pot or pitcher.

Pour the warm mulled beer into mugs and garnish with extra cinnamon sticks or orange slices.

Enjoy your delightful Mulled Beer!