Preheat the Oven: Preheat your oven to 180°C (350°F) and grease a cake tin with butter or line it with parchment paper.
Cream the Butter and Sugar: In a mixing bowl, cream together the softened butter and sugar until light and fluffy. This will take about 3–4 minutes using an electric mixer.
Add the Almond Essence: Once the butter and sugar are creamed together, add in the almond essence and mix until well incorporated.
Mix Dry Ingredients: In a separate bowl, sift together the plain flour, baking powder, and ground almond flour.
Combine the Ingredients: Gradually add the dry ingredients to the wet ingredients while mixing continuously. Mix until just combined and a thick batter forms.
Bake the Cake: Pour the batter into the prepared cake tin and spread it evenly. Bake in the preheated oven for 25–30 minutes, or until a toothpick inserted into the center comes out clean.
Cool and Serve: Let the cake cool in the tin for 10 minutes before transferring it to a wire rack to cool completely. Slice and serve as desired.