During rainy days, the common comfort food for Filipinos are mostly soupy like arroz caldo, batchoy, ginataan.. For the not-so soupy, you have the turon, fruits in condensed milk, kakanin - puto, palitaw, ube matched with hot chocolate. You may find more merienda treats here: https://podio.com/bcbpublishing/iap-as-boon-keong-lai/apps/communications/items/26
Duirng rainy season, my family loves champorado but with a twist which you might be interested in trying, too! Instead of the usual malagkit rice and cocoa powder, we use a mixture of malagkit and black rice. We also use tablea balls and coconut milk. :)
Maja blanca sounds nice. In our home, we used to make maja with ginataan-like sauce. Oh, it's so heavenly it's making me drool right now.