Step 1: Preheat Your Oven - Begin by preheating your oven to 350°F (175°C). This ensures that your cake bakes evenly.
Step 2: Prepare Your Cake Pan - Grease a 9-inch round cake pan with a little coconut oil or line it with parchment paper for easy removal.
Step 3: Mix the Dry Ingredients - In a large mixing bowl, combine the coconut flour, almond flour, baking soda, and sea salt. Whisk these ingredients together until well blended.
Step 4: Combine the Wet Ingredients - In another bowl, whisk together the eggs, maple syrup or honey, coconut milk, melted coconut oil, and vanilla extract until smooth and creamy.
Step 5: Combine Wet and Dry Ingredients - Pour the wet mixture into the bowl with the dry ingredients. Stir until just combined. Be careful not to overmix, as this can lead to a denser cake.
Step 6: Fold in the Blueberries and Walnuts - Gently fold in the fresh blueberries and chopped walnuts, ensuring they are evenly distributed throughout the batter.
Step 7: Pour into Cake Pan - Transfer the batter into your prepared cake pan, smoothing the top with a spatula.
Step 8: Prepare the Topping - In a small bowl, combine the melted coconut oil, coconut sugar or maple syrup, ground cinnamon, and a pinch of sea salt. Mix well and sprinkle it evenly over the top of the cake batter.
Step 9: Bake the Cake - Place the cake in the preheated oven and bake for 30-35 minutes, or until a toothpick inserted in the center comes out clean.
Step 10: Cool and Serve - Once baked, remove the cake from the oven and let it cool in the pan for about 10 minutes. Then, transfer it to a cooling rack to cool completely before slicing. Enjoy your Healthy Blueberry Coffee Cake warm or at room temperature!