Chocolate desserts for Thanksgiving?

Thanks for all the ideas--just fyi, I'm leaning toward chocolate pecan pie.

Our favorite Thanksgiving dessert is Chocolate pecan Pie. I use an old Craig Claiborne recipe . You could probably. Just add 2 Oz of unsweetened chocolate to a favorite pecan pie recipe.

Definitely chocolate mousse because it can made ahead and chilled in little teacups or dessert wine glasses for a festive look. However, do take them out of the fridge for 10-15 minutes prior to serving. Another lighter make-ahead chocolate dessert that is flour-free is torta cioccolata, served with just a little loosely-whipped cream flavored w/ maple syrup. Great served with coffee after dinner. Almond meal can be found at Trader Joe's or Bob's Red Mill online. Here's a Mario Batali recipe, but there are plenty of authentic recipes on Italian websites, too. http://www.foodnetwork.com/recipes/mario-batali/flourless-chocolate-cake-torta-di-cioccolato-recipe.html

I'm looking forward to trying this recipe for Thanksgiving this year. It's got chocolate, but I feel like the oatmeal makes it somehow cozy and Thanksgiving-y.
https://food52.com/recipes/24910-black-bottom-oatmeal-pie
You can also never go wrong with Ina Garten's chocolate pudding tart from How Easy Is That?

Why not make a chocolate mousse? Yes, it's rich, but it doesn't feel so. and it's easy and do-aheadable and everyone likes it. You could do a pie as well.

Bon Appetit had a delicious chocolate tart in the November issue. It's on epicurious and Bon Appetit's website.

I really love this chocolate tart from Smitten: http://smittenkitchen.com/blog/2008/11/dark-chocolate-tart-with-gingersnap-crust/
I've made this for Thanksgiving before and it fit well with the other desserts, especially with the gingersnap crust.

I really cannot recommend Gena's vegan chocolate tart highly enough. I am not a vegan, and I was SO skeptical because I am pretty discerning about chocolate, but I've made it twice for a big parties and it got such rave reviews from tons of hearty, non-vegan eaters. It's incredibly easy to make, and it has this bizarre effect of tasting intensely rich but feeling light after you eat it (because it's mostly tofu) -- which is great for the end of a heavy meal. It sounds weird but I would so encourage everyone to try it. https://food52.com/recipes/25316-vegan-chocolate-pie

I'm in the camp with a French silk pie or chocolate torte.

I've actually made chocolate ice cream (at my husband's request) for Thanksgiving. How about a chocolate pecan pie? I haven't made this one, but it looks good: https://food52.com/recipes/24673-salted-caramel-chocolate-pecan-pie

fiveandspice's milk chocolate nutmeg tart with hazelnut crust is awesome: https://food52.com/recipes/16037-milk-chocolate-nutmeg-tart-with-hazelnut-crust

Susan W's idea of asking your MIL is great! Meanwhile, awaiting your asking & her response, 2 suggestions using chocolate & hazelnut (not Nutella, but why not?)...Nigel Slater's' Wholemeal (aka wholewheat to Americans) Chocolate, Hazelnut & Coffee cake esurientes.blogspot.ca/2005/08/shf-coffee-chocolate-hazelnutbrilliant.html or Tamasin Day-Lews' hazelnut chocolate cake http://uktv.co.uk/food/recipe/aid/513370

This tart is rich and scrumptious. I've made it several times. It's also very easy. http://www.epicurious.com/recipes/food/views/Chocolate-Truffle-Tart-237198

Can't go wrong with homemade truffles... Can be made ahead, not a lot of work, and don't take up much space. Maybe roll them in hazelnuts or almonds since you mention she likes nuts.

Oh lawdy..those MILs. We always do pies for Thanksgiving and chocolate for Christmas. I think because we all adore pumpkin and apple pies after turkey.

Have you thought about asking her what her dream dessert might be? You know we could all help you find the right recipe if she would come up with a dessert wish.

Chocolate desserts we have done..Thomas Kellers brownies. We served them with whipped cream or ice cream. Chocolate mousse torte. Basically, a chocolate mousse with an oreo crust made in a springform pan. Either of these could be topped with candied or plain nuts. We're not huge nut fans, but pistachios were fun on both desserts.