I would like to say that this is my favorite group in the net. Up to now almost every recipe I've tried has come out great. Here is a recipe for a guava cake. It's from El Nuevo Dia, 4/14/91, contributed by Marta Pizarro.
Ingredients:
12 tbs butter
1 cup sugar
2 cups flour
2 eggs
1 t. baking powder
1 tsp vanilla extract
8-10 oz guava paste
Procedure
1. Preheat oven at 350F
2. Cream butter. Add sugar little by little. Add eggs one by one,
followed by the vanilla
3. Sieve flour and baking powder and mix with the above
4. Pour half the batter on a greased mold.
5. Place the guava paste (cut in slices) so as to cover all the
batter
6. Pour the rest of the batter and bake for 45-60 min, or until an
inserted toothpick comes out clean.
Notes: I have substituted butter with margarine, but the cake comes
out a little more dry. The slices I cut are about 0.5 cm, but they
can be even thicker depending on your taste.
If you have left over guava paste you can make an easy desert by
cutting slices and eating them along with cheese (in Puerto Rico we
commonly use a white salty cheese) so it's not so sweet. The guava
paste can be stored in the refrigerator, after opening, for several
weeks.