@3fecta Hi. Generally anything above 2500 elevation is when you need to start tweaking leveners, sugar, flour, and oven temp. You can prob rely on sea level recipes as long as it's a legit developed recipe. For soft sponge cakes though - if you've noticed weird doming then falling when cooled, you might try decreasing the levener by a gram or so, and increasing the flour by 5g. Otherwise, cookies, quick breads, etc are prob are ok as your recipe directs at 2300. 👍