itch.io

Same problem

On PC I know you go to your home chest or inventory and drag them over each other or go to your home chest, view the recipe list and then click on the final product of the recipe you're trying to make. For example, for a potion recipe you need herb + blue mushroom = potion. if you have all the ingredients click the potion icon after the "=" sign and should be added to your home chest/inventory. Not sure about android but I would imagine it's similar. If you have a recipe scroll go to your inventory/home chest, click on the scroll, click use. Hope this helps!

simply drop(or drag) the ingredients you want to combine together

or if you already have a recipe, you go to the forest and open the bag then click on the recipe and select use