diff --git a/README.md b/README.md
index cda824a..055a4fb 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ However, there won't be much to look at until you add some recipes!
 ## Recipe file format
 Recipes are found in `_recipes/`, with subrecipes located in `_subrecipes/`.
 
-Here's an example recipe, which could be saved to `_recipes/chocolate_cake.yml`:
+Here's an example recipe, which could be saved to `_recipes/chocolate_cake.md`:
 ```yaml
 ---
 name: Chocolate cake
@@ -48,7 +48,9 @@ time: 240
 - `name` (string) - The displayed name of the recipe. Does not appear in the URL.
 - `author` (string, optional) - The author of the recipe.
 - `ingredients` (list) - Each entry in `ingredients` is an array consisting of up to four items:
-	- amount (number or array) - The amount of this item to add, e.g. `2` for 2 cups of flour. If this is `0`, the output will be e.g. "jalepeño chillis to taste" rather than "0 jalepeño chillis". If this in an array, it will be printed as `amount[0] to amount[1]`. For example, if you wanted to say "2 to 3 cups of peas", you would write `[[2, 3], peas, cups]`.
+	- amount (number or array) - The amount of this item to add, e.g. `2` for 2 cups of flour.
+		- If this is `0`, the output will be e.g. "jalepeño chillis to taste" rather than "0 jalepeño chillis".
+		- If this in an array, it will be printed as `amount[0] to amount[1]`. For example, if you wanted to say "2 to 3 cups of peas", you would write `[[2, 3], peas, cups]`.
 	- ingredient name (string) - The name of the ingredient, e.g. `flour` for 2 cups of flour.
 	- unit terminology (string, optional) - The unit that amount refers to, e.g. `cups` for 2 cups of flour. If left blank or null, as in `[1, egg]`, the output will simply be "1 egg".
 	- optional (boolean, optional) - Whether or not this ingredient is optional. The ingredient `[1, chocolate egg, null, true]` produces "1 chocolate egg" and marks is as optional. Defaults to `false`.
@@ -57,7 +59,7 @@ time: 240
 
 The recipe's file name isn't important, but it's good practice to make it something obvious, like `chocolate_cake.md` and not `strawberry_pie.md`.
 
-The recipe files are standard YAML. Every recipe **must** begin and end with three dashes [to ensure that Jekyll processes it](https://jekyllrb.com/docs/front-matter/).
+The recipe files are standard YAML. Every recipe **must** begin and end with three dashes [to ensure that Jekyll processes it](https://jekyllrb.com/docs/front-matter/). Jekyll only processes files with certain extensions. Even though the recipes are formatted as YAML, they can't be saved as `.yml` or `.yaml` files - they must be saved with an extension that Jekyll will process, like `.md` or `.html`.
 
 Good:
 ```yaml