A tender, vanilla-scented gluten-free vanilla buttermilk cake that's especially great for birthday celebrations. A few simple gluten free flours are all you'll need to make this special cake.
Butter two 9-inch cake pans and line with parchment paper.
In a large bowl, beat the butter and sugar together using an electric mixer until light and fluffy, about 5 minutes. Beat in the eggs one at a time; add the vanilla.
In another large bowl, whisk together the flours, baking powder and salt. With mixer on low, add half the flour mixture to the butter and egg mixture and beat until just combined. Add the buttermilk and mix well to combine. Add the remaining flour mixture and beat until just combined, scraping down the bowl as necessary.
Pour batter into the prepared pans and rest for at least 15 minutes. Preheat oven to 350°F, place cake in the oven, and bake for about 45 minutes, until a tester inserted in the middle of the cake comes out clean and edges are starting to come away from the edge of the pans. Remove from oven and place on a rack to cool for 30 minutes, then turn the cake out onto the rack to cool completely.
Fill and frost with your favorite frosting of choice. Cake will keep, well covered in the fridge, for 3 days.
Notes
Substitution for oat flour -- sorghum flour by weightSubstitution for sweet white rice flour -- try almond flourSubstitution for tapioca flour -- try arrowroot Butter substitute -- use your favorite non-dairy butter of choice or coconut oil at soft room temperatureButtermilk substitute -- combine your favorite non-dairy milk of choice with 1 tbs + 2 tsp vinegar, let sit for 15 minutes before using