Prepare: Ensure strawberries and banana are fully frozen solid. Chill your serving bowl in the freezer for 5-10 minutes.
Load Blender: Pour plant-based milk (starting with only 1/4 cup) and optional vegan yogurt into the blender first.
Add Solids: Add the frozen strawberries, frozen banana slices, and any optional boosters (protein powder, nut butter, seeds).
Blend: Secure the lid. Start the blender on low speed, then quickly increase to high. Use the tamper vigorously and continuously to push the frozen fruit down towards the blades, ensuring everything is moving and blending evenly. Blend until the mixture is thick, smooth, and creamy like soft-serve ice cream (usually 60-90 seconds in a high-speed blender).
Troubleshooting: If the mixture is too thick and won't blend, add only 1 tablespoon more plant-based milk at a time, blending briefly after each addition. Be very cautious not to add too much liquid.
Check Consistency: The texture should be very thick and hold its shape on a spoon. If it's too thin, add a bit more frozen fruit or 1 tbsp chia seeds and blend briefly.
Serve: Immediately scrape the smoothie mixture into your chilled bowl. Work quickly to prevent melting.
Add Toppings: Decorate with your desired toppings like fresh strawberry slices, granola, seeds, nuts, and a drizzle of nut butter.
Enjoy: Grab a spoon and enjoy immediately!