I'm not sure of what the etiquette is here, but I've only been to one wedding where there was a groom's cake and it was served at the actual reception.
We're having ours at the rehearsal dinner (but that's mainly to save $1.50 per person "cake cutting fee" from the caterer. We're having cupcakes as our "wedding cake" to also save on that fee.)
I don't think there are any rules. Traditionally it was always served at the reception but I have seen it at RDs now. We didn't have one at all and just made one of the tiers of the bride's cake chocolate.
Shhhh... I'm secretly doing TWO groom's cakes. One will be the one my FI knows about (but doesn't know what it looks like) and will be at the Rehearsal Dinner, used as the dessert... and another one (the surprise) will be at the reception. [:
You can do it either or. Traditionally it was served at the wedding for the guests to take home. I recently learned from another knottie that it was a southern tradition and that only single ladies took it home to put under their pillows so they could dream about their future husbands.
I will serving our grooms cake at the actual wedding as he is planning his own cake and will want to show it off to everyone.
Seems like there are a lot of different traditions so you really can't go wrong.
I always thought the groom's cake was the top layer of the wedding cake which was frozen and saved for the first anniversary. I was speaking about my plans for my son's rehearsal dinner and my neighbor asked if I had the groom's cake for the dinner yet. That's why I found my way here.
Re: Groom's cake...
I was in a wedding in September and they served it at the rehearsal dinner.
With All the Trimmings