Prepare the Batter (Night Before)
In a large bowl, mix the sugar, yogurt, oil, egg, sourdough discard, and extracts until somewhat smooth.
In a separate bowl, whisk together the dry ingredients.
Add the dry ingredients to the wet ingredients, alternating with the milk, and mix until just combined. Don’t overmix to avoid dense muffins.
Cover the bowl and let the batter sit overnight in the refrigerator.
Baking the Muffins (Next Morning)
Preheat your oven to 400°F (200°C) and line a muffin tin with liners or grease it well.
Gently fold the frozen raspberries into the chilled dough.
Spoon the chilled batter evenly into the muffin cups, filling each about ¾ full.
Bake for 18-22 minutes, or until a toothpick inserted into the center of a muffin comes out clean or with just a few moist crumbs.
Let the muffins cool in the tin for 5 minutes, then transfer them to a wire rack to cool completely.
Overnight rest: The overnight rest gives the sourdough a chance to contribute a subtle tang and soften the wheat germ and flour for a moist crumb as well as make the muffins more digestible.
Texture and flavor: These muffins will have a soft, tender texture with a nutty flavor from the wheat germ and almond extract and a burst of tartness from the raspberries.
Serving: 75g | Calories: 160kcal | Carbohydrates: 22g | Protein: 3g | Fat: 7g | Saturated Fat: 1g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 5g | Cholesterol: 10mg | Sodium: 190mg | Potassium: 120mg | Fiber: 2g | Sugar: 6g | Vitamin A: 200IU | Vitamin C: 1mg | Calcium: 40mg | Iron: 1mg