Preheat your oven to 350°F (175°C) and prepare your 9-inch round cake pan by greasing it with butter or lining it with parchment paper.

In a large mixing bowl, combine the guava puree, eggs, melted butter, and sugar. Whisk until smooth, about 2-3 minutes.

Gradually add all-purpose flour and baking powder to the wet mixture, folding in gently until just combined.

Pour the batter into the prepared cake pan and bake for 25 to 30 minutes. Check for doneness with a toothpick.

After baking, cool the cake in the pan for 10 minutes, then transfer to a wire rack to cool completely.

Once cooled, frost the cake generously with your creamy frosting.