To make the cake batter, begin with the dry components. Into a big bowl, add the remaining all-purpose flour, the almond flour, granulated sugar, baking soda, and remaining ¼ teaspoon salt. Whisk these components collectively, and set them apart for a minute. Within the bowl of a mixer, add the applesauce, ½ cup melted butter, eggs, maple syrup, and vanilla extract. Combine till these components are completely mixed. Lastly, dump the dry components proper into the bowl with the moist components, and stir till they’re simply mixed, forming a cohesive batter.