Final answer:
Oscar's frosting will taste more buttery because his recipe has a higher butter to powdered sugar ratio compared to Marla's frosting recipe, with 39 cubes of butter per cup of sugar versus approximately 0.43 cubes per cup in Marla's recipe.
Step-by-step explanation:
When comparing frosting recipes to find out which one will taste more buttery, we should look at the ratio of butter to other ingredients. Oscar's recipe calls for 234 cubes of butter and 6 cups of powdered sugar, and Marla's recipe calls for 3 cubes of butter and 7 cups of powdered sugar. To compare the two, we calculate the ratios of butter to sugar for both recipes.
Oscar's recipe has a ratio of 234 cubes of butter to 6 cups of sugar, which simplifies to 39 cubes of butter per cup of sugar. Marla's recipe has a ratio of 3 cubes of butter to 7 cups of sugar, which is approximately 0.43 cubes of butter per cup of sugar. Since Oscar's recipe has a significantly higher ratio of butter to sugar, Oscar's frosting will taste more buttery.