If you don't have access to a kitchen scale, there are a few alternative methods you can use to approximate 50g of flour:
Measuring Cups: Use a measuring cup designed for dry ingredients. Spoon flour into the measuring cup until it reaches the top, then level it off with a straight-edged utensil. Keep in mind that the density of flour can vary, so this method might not be as accurate as using a scale.
Spoon and Level: Use a spoon to scoop flour into a measuring cup, then level it off with a straight-edged utensil. This method is less precise than using a measuring cup, but it can give you a rough estimate.
Reference Object: Find a small object that weighs approximately 50g, such as a quarter cup of water, which is roughly equivalent. Fill a quarter cup with water and use it as a reference to estimate the amount of flour you need. Be aware that this method might not be entirely accurate due to variations in density between water and flour.
Remember, these methods are not as accurate as using a kitchen scale, but they can provide a rough estimate for your recipe.