If someone could help me out on this I would greatly appreciate it. A bride has asked me for a white cake with pastel de guava filling. Does anyone know how to make this or where to find the pastel de guava filling?

Thank you for your help!

I believe the bride meant guava paste filling. You can always double check with her.
To prepare filling you just need guava paste and water. You can buy Guava paste at a latin grocery store. Even supermarkets carry it with other spanish products.
like the one in the link

http://www.latinpantry.com/s_productinformation.asp?categoryID=321&productID=684

To prepare the filling

Cut the guava paste in little pieces take about one cup or so of boiling water and put it inside a blender until spreading consistency . The paste is already sweet so you don't need to add sugar.

Thank you for your help! I am going to look for the guava paste this evening and use your method. I hope this is what she is looking for! Thank you!

You can also buy the guava filling that comes in the sleeve. It's sold at most cake decorating supplier.

I just found this while googling "guava cake filling" because I have the same request. I am doing the wedding cake for a dear friend and she wants guava filling - and I have NO idea how to make it! I just tried out a recipe for guava curd and either I did something wrong or there is no way this is meant to be a cake filling (admittedly, the recipe I took it from topped the cake with the curd and did not use it as a filling) - it is way too watery. If you found a guava filling recipe, other than just liquefying guava paste, can you share it? Or did the bride mean exactly that ... she wanted guava paste or preserves as her cake filling? I'm so frustrated as I can't seem to find a recipe for this stuff!

Si les interesa, aqui estan dos recetas de cake que usan la guava, no pasta:
2 trozos de mantequilla
2 tazas de azucar
4 huevos
2 tazas de harina de cake
1 cucharadita de nuez moscada
1-1/4 cucharadita de soda de hornear
1/4 cucharadita canela
1/4 cucharadita de clavo de olor (? - hay algo que se llama asi? clavo de olor? Si no, disculpen - eso es lo que dice el diccionario de traduccion)
1 taza de pulpo de guava (cocinada o fresca)
1/2 taza de jugo de guava (fresco o de lata)
Cremar la mantequilla y el azucar juntos muy bien. Anadir los huevos, de uno en uno, batiendo bien al anadir cada uno. Cierne los ingredientes en polvo juntos. Combine el pulpo y el jugo de la guava. Anada alternando la mezcla de la guava y la mezcla de los ingredientes secos (harina, etc.), al azucar con mantequilla, empezando, y terminando, con la harina. Hornee a 350 grados por 30 a 35 minutes en un molde de 9 pulgadas (22.5 cms).

La otra receta:
Cake de Guava Batido
1 paquete de galletas lady fingers o una libra de cake
1 pequeno paquete de gelatina de limon
1 taza de agua hirviendo
1 lata de 6 onzas de nectar de guava congelada que hace una taza
1 clara de huevo
1 taza de crema de batir
Coco o canela rallados para poner encima del cake
Ponga un poco de aceite en un molde Pyrez de vidrio en la forma de un loaf de pan y ponga a los lados y en el fondo los lady fingers o el cake. Disuelva la gelatina en el agua hirviendo. Anada agua fria a las 6 onzas de guava para hacer una taza. Combine con la gelatina y mezclelas muy bien. Enfrie hasta que endurezcan. Bata la clara de huevo hasta que el tenedor se pare pero no hasta que la espuma este dura. Batee (whip) la guava hasta que este ligera y rosada. Fold (o sea mezcla cuidadosamente con cucharada no con el batidor electrico) la guava y el huevo y los pone en el molde. Enfrie en el refrigerador de 4 a 6 horas. Saque del molde. Decore con crema batida y el polvo de canela o el coco rallado.

Disculpen si no me hize entender. Me envian un mensaje y puedo explicarlo de nuevo.