Add Slow Cooker Apple Butter recipe

I made this in the fall to use up a bag of apples.  It was really good!

Signed-off-by: Anna Schumaker <Anna@OcarinaProject.net>

sauces/slow_cooker_apple_butter.tex

@@ -0,0 +1,32 @@
+%
+% Copyright 2016 (c) Anna Schumaker.
+%
+\documentclass{../recipe}
+
+\recipeName{Slow Cooker Apple Butter}
+\recipeSourceWeb{All-Day Apple Butter}{http://allrecipes.com/recipe/21205/all-day-apple-butter/}
+\recipeMakes{12 cups}{butter}
+
+\begin{document}
+\begin{ingredients}
+\addIngredient{5\half pounds}{apples}
+\addIngredient{4 cups}{white sugar}
+\addIngredient{2 teaspoons}{ground cinnamon}
+\addIngredient{\quarter teaspoon}{ground cloves}
+\addIngredient{\quarter teaspoon}{salt}
+\end{ingredients}
+
+\begin{steps}
+\addStep{Peel, core, and finely chop \ingredient{apples}.
+	 Transfer to slow cooker.}
+\addStep{In a \textbf{medium} bowl, mix the \ingredient{sugar},
+	 \ingredient{cinnamon}, \ingredient{cloves}, and \ingredient{salt}.
+	 Pour over \ingredient{apples} and mix well.}
+\addStep{Cover slow cooker and cook on \textbf{high} for \textbf{1 hour}.
+	 Reduce heat to \textbf{low} and cook for \textbf{9 -- 11 hours},
+	 until \textbf{mixture} is thickened and dark brown.  Stir occasionally.}
+\addStep{Uncover and cook \textbf{1 hour}.
+	 Stir with a whisk to increase smoothness.}
+\addStep{Pour into sterilized jars and seal immediately.}
+\end{steps}
+\end{document}