No problem, you're thinking. Brandy burns at such a low temperature, you can play snapdragon with your combustible dessert.
And snapdragon is a lot of fun.
But the plum pudding you're imagining is decorated with holly leaves. Maybe freshly cut holly leaves, maybe dried, maybe--and this would be interesting--plastic.
Igniting your combustible dessert won't burn your fingers, but it will get your holly leaves going in a very serious way, as we discovered a couple of years ago. Your flaming holly leaves could, theoretically, get other things going, too.
So.
Take the holly off and put it well aside before you light the brandy.
Live a long time.
And Happy Yule.