@SorenMRiis
I feel like I'm just throwing this recipe at people all the time because I love it so much, but I make this with Bob's Red Mill 1:1 gf flour and it's spectacular. You don't have to make it a layer cake if you don't want to (just cut quantities by about a third so you don't have too much batter). If you prefer a different flavor icing than the ganache, any vegan glaze will work, just make sure the cake is fully cooled first, and make the glaze on the thick side so it doesn't just absorb into the cake. I've made it with cherry glaze, mint glaze, and coffee glaze, and they were all great.

https://www.marthastewart.com/1530847/vegan-chocolate-cake