What dessert would be good at a BBQ?

Peach cobbler

Texas sheet cake!

Brownies or chocolate chip cookies.

Marian Burros’s famous Plum Torte, https://food52.com/recipes/24469-marian-burros-plum-torte

Very easy to make. You could double the batch and make it in two 8-inch square aluminum foil pans. Tastes great the next day. Can use Italian plums, black plums, peaches, berries.

Slab apple pie is easy and great for a larger group. https://food52.com/recipes/22689-martha-stewart-s-slab-pie

Smores pie or smores cheesecake.

A seasonal fruit trifle, watermelon, brownies, cupcakes or apple pie just to name a few.

broiled or grilled fruit, eg pineapple, pears, plums, peaches