Preheat the oven to 350 F and grease and line a standard loaf pan with parchment paper
Using an electric mixer, cream the butter with sugar until creamy
Add eggs one at a time and mix until fluffy. Stir in vanilla and lemon zest
Whisk the rice flour, almond flour and baking powder, then add into the wet mixture. Using a rubber spatula, mix to combine. Stir in milk and transfer the batter into the loaf pan
Bake for 50 - 60 minutes, until it passes the toothpick test
Remove the cake from the oven and rest for 5 minutes. Then transfer onto a cooling rack and sprinkle with 1 teaspoon of berry sugar. Cool fully before serving
