flour-generally, use all-purpose or whole wheat flour, but for more flavour, try rye flour or buckwheat, even almond flour could work.Instant oats or minute oats tend to be too fine and powdery

oats-use rolled oats or large flake oats which are slightly less processed and have a more defined shape and texture.sugar-white sugar will lead to no additional flavour, while brown sugar or muscovado will lend deeper caramel and molasses notes to crumb topping.

Crumble toppings usually have the same basic ingredients: There are so many recipes for crumble topping. The easiest recipe to make (and the easiest recipe to remember) for crumb topping Do so before mixing with the sugar and thickeners. You can also defrost the peaches in the microwave if you are short on time. Mix that reduced peach juice concentrate with the peach slices and proceed to fill your pie and bake according to the directions. Place the juices in a saucepan to cook down and thicken them (as written below). Then, strain the peach juices, reserving the peaches back in the same bowl you defrosted them in.

Cover and let the peaches defrost overnight in the fridge, stirring every so often to evenly defrost. Mix the frozen sliced peaches with the filling ingredients. If it's winter and you have a craving for peach pie, frozen peaches will definitely do the trick and you will end up with a great peach pie.

Sour cream peach pie with crumb topping