Preheat the oven to 425 Fahrenheit (218 C). Prepare the muffin pan by placing muffin cups in a muffin pan or by greasing pan.
Strawberries: If your frozen strawberries are not sliced, cut them into small chunks now using a sharp knife. If needed let them sit 5-10 minutes to soft before chopping into bite-sized pieces. Then place them back into the freezer.
Dry ingredients: In a large bowl mix the dry ingredients (both flours, sugar, baking powder, baking soda, and salt). Use a whisk to mix everything well.
Wet ingredients: Melt the butter, let it cool slightly. In a large mixing bowl, place the butter (or oil), eggs, yogurt, water, and vanilla. Whisk together all the wet ingredients until everything is combined well.
Fold everything together: Add the sliced frozen strawberries to the flour mixture and combine. Add the flour strawberry mixture into the wet ingredients. Use a spatula to stir the batter together - about 12-15 folds, just until everything is incorporated. If you over-stir, they will not rise well.
Scoop & bake: Add about ⅓ cup of batter to fill each muffin cup all the way up. Place the muffin tin in the preheated oven for 8 minutes at 425 degrees Fahrenheit (218 C), then turn the oven to 375 degrees Fahrenheit (190 C) and bake for another 8-10 minutes. Remove muffins from the oven when they are golden brown, and when the centre does not look gooey.