If the cake doesn't set, there are a few things you can try to salvage it. You can try placing it back in the oven for a little longer at a lower temperature to help it cook through without burning the outside. Another option is to refrigerate the cake for a few hours to help it firm up. If all else fails, you can crumble the cake and use it as a base for a trifle or cake pops. **

For indoor shoes, non-marking soles are typically allowed. Non-marking soles are designed to not leave scuff marks or damage indoor surfaces such as gym floors or basketball courts. This type of sole is often made of softer rubber or synthetic materials that provide good traction without causing any damage. It is important to check the specific rules or guidelines of the indoor facility to ensure that the shoes you are wearing have the appropriate sole. **

Running shoes with a stable sole typically have features like a wide base, firm cushioning, and a supportive midsole. Brands like Brooks, Asics, and New Balance are known for producing running shoes with stable soles that provide good support and help prevent overpronation. Look for shoes with terms like "motion control" or "stability" in their descriptions for options with stable soles. **

You can search for shoes without a rubber sole by using specific keywords such as "leather sole shoes" or "non-rubber sole shoes" in your online search. You can also visit specialty shoe stores or high-end fashion retailers that may carry shoes with alternative sole materials such as leather, wood, or synthetic materials. Additionally, you can check the product descriptions and materials listed on shoe websites to find options without rubber soles. **

A non-marking sole is suitable for indoor shoes. Non-marking soles are made of materials that do not leave scuff marks or black streaks on indoor surfaces such as gym floors, basketball courts, or dance studios. This type of sole is designed to provide traction and stability without causing damage to the floors. It is commonly used in athletic shoes, dance shoes, and other indoor footwear to ensure a safe and clean environment for indoor activities. **

If the cake does not set, there are a few things you can try to salvage it. First, you can try placing it back in the oven for a few more minutes to see if it will firm up. If that doesn't work, you can try refrigerating the cake to help it set. If all else fails, you can crumble the cake and use it as a base for a trifle or cake pops. **

To let the cake set in the oven, you should follow the recipe instructions for baking time and temperature. Once the cake is done baking, turn off the oven but leave the cake inside with the oven door slightly ajar. This allows the cake to continue cooking gently with the residual heat, helping it to set and firm up without overcooking. After about 10-15 minutes, you can remove the cake from the oven and let it cool completely before serving. **

To set a quark cake at the bottom, you can start by preparing the crust and pressing it firmly into the bottom of the cake pan. Then, you can pour the quark cake batter over the crust and spread it evenly. Once the batter is in the pan, you can gently tap the pan on the counter to help the batter settle and remove any air bubbles. Finally, you can bake the cake according to the recipe instructions, and once it's done, allow it to cool and set in the refrigerator before serving. **