Preheat the oven & prepare cake pans - Start by preheating your oven to 350°F and preparing 2 8" round cake pans with parchment paper on the bottom and lightly greasing the sides with coconut oil. This ensures easy removal and clean cake layers. See notes for how to make this recipe into a 3 layer 8" cake or a 2 layer 9"
Combine dry ingredients - In a stand mixer or large bowl, add all of your dry ingredients. Whisk thoroughly to evenly combine and remove any clumps from the cocoa powder.
2 cups 1 to 1 gluten free flour blend, 1 cup unsweetened cocoa powder, 2 tbsp arrowroot powder, 1 tsp baking soda, 1/2 tsp sea salt, 1 3/4 cup coconut sugar
Add the wet ingredients - Directly into the same bowl add the wet ingredients: coconut milk, apple cider vinegar, eggs, melted coconut oil, and vanilla extract. Whisk until smooth and fully combined, making sure to scrape the bottom of the bowl and sides so no dry ingredients remain. The cake batter should be thick and cohesive at this stage.
1 cup coconut milk, 1 tbsp apple cider vinegar, 3 large eggs, 1/2 cup coconut oil, 2 tsp vanilla extract
Add the coffee or hot water - Slowly pour in the hot coffee or hot water while whisking. This step enhances the chocolate flavour and creates a smooth, pourable batter that results in a moist, tender crumb.
1 cup hot coffee
Add cake batter to prepared pans - Divide the cake batter evenly into your prepared pans and bake for 25–35 minutes depending on pan size. The baking time will vary slightly, so begin checking around 25 minutes. The cake is done when a toothpick inserted into the center of the cake comes out clean or with a few moist crumbs.
Allow cakes to cool - Allow the cakes to cool in the pans for about 10–15 minutes before transferring to a cooling rack or wire rack. Let them cool completely before assembling to prevent melting your frosting.