I don't know if you are still interested in making banana pudding from scratch, but this weekend I posted a hub on how I make it. It is hard to find a good recipe, but my kids loved this! Hope it helps, and if you want to see a photo, just search the title of my recipe.
Homemade & Gluten-free Banana Pudding
1/4 cup corn starch
1 cup granulated sugar
2 cups whole milk
2 eggs beaten, 3 if you want more protein
1 or 2 mashed bananas
In a large sauce-pan or double broiler, combine sugar and corn starch. Stir in one cup of the milk to dissolve the sugar and corn starch, then add the other cup of milk. Turn heat to low or low-medium and slowly bring mixture to a gentle boil, stirring constantly.
Boil gently about 1 minute, then slowly add the beaten egg while stirring. Stir another 2 minutes, or until thickened.
Remove from heat and add mashed bananas. Return to heat and stir until thickened to preference, about 1 more minute. Pour into a glass serving dish and allow to cool 10 minutes.
Pick out a stencil of your choice. This could be a paper doily, a quilt stencil, or a stencil made from cardboard. Lay stencil over the top of the pudding, but not allowing it to touch the surface. Carefully sprinkle with cinnamon or nutmeg, then remove the stencil.
Now you have pudding ready to serve! It may be served warm or chilled, or any of the variations I will list next.