How do you become a better baker? How do you become a better human? Just keep trying different things until you hit your ideal, I guess. Here's what goes through my brain when I'm reworking a nonrecipe into a recipe.

Final version of chocolate banana cassava cake:
3 bananas, mashed
1/4 c evoo
1/2 c granulated sugar
Pinch salt
1 1/2 tsp baking powder
1/4 tsp baking soda
1/2 tsp baking spice (your choice)
2 tbsp coconut powder (optional)
1/4 c yogurt
1 large egg
160 g cassava flour

Stir all ingredients together until smooth and combined.
Divide batter into 2 and into 1 portion of batter, add:

13 g cocoa
1/2 tsp almond extract
48 g sweetened condensed milk
1/2 c. chopped chocolate (optional)

Pour both batters into an 8" square pan greased with butter and lightly swirl together.
Bake at 350°F for about 22 minutes until surface is matte, edges bounce back slightly when pressed and begin to release from sides of the pan.

Optionally, brush with liqueur or syrup while hot.