Preheat your oven to 350°F (175°C). Grease a 9-inch round cake pan.
Combine dry ingredients: In a large mixing bowl, whisk together 1 1/2 cups gluten-free all-purpose flour, 1/2 cup almond flour, 1 cup coconut sugar, 1 tbsp ground cinnamon, 1/2 tsp ground nutmeg, 1 tsp baking powder, 1/2 tsp baking soda, and 1/4 tsp salt.
Mix wet ingredients: In a medium bowl, whisk together 1 cup almond milk, 1/3 cup melted coconut oil, 1 tsp apple cider vinegar, and 2 tsp vanilla extract until smooth.
Combine: Pour the wet ingredients into the dry ingredients. Stir with a spatula until just combined.
Transfer to pan: Pour the batter into the greased cake pan, smoothing the top with your spatula.
Bake: Place in the preheated oven and bake for 30 minutes, or until a toothpick inserted into the center comes out clean.
Cool and enjoy: Let the cake cool in the pan for 10 minutes before transferring to a wire rack to cool completely. Slice and savor with your favorite coffee.