In a large bowl combine flours, baking powder, baking soda, and sugar. Add soy milk, jam, and melted vegan butter.
Create a smooth batter and lastly, add chopped strawberries.
Scoop the batter into the muffin baking pan lined with baking paper and bake them at 400F (200°C) for about 25-30 minutes.
When the muffins are baked, let them cool down completely before decorating with the frosting.
In a small saucepan cook soy milk with cornstarch until thick. Set it aside to cool down and put it into the fridge for at least 1 hour.
Lastly, in a medium-sized bowl whisk vegan butter and sugar with a hand mixer. Slowly add the cornstarch mixture, strawberry powder, and strawberry jam. Whisk until everything is combined and the frosting is light and airy.
Decorate the muffins with the strawberry frosting and a fresh slice of a strawberry. Enjoy.