Stack level too deep error - what's wrong with this code?

I've a bit of repeated code in a controller I'm using, which I thought I'd drop into a method. However, doing so raises a 'stack level too deep' error. I understand this means there's an infinite loop in there somewhere, though I can't see it (I'm pretty new to this)!

Here's the controller code that works, though isn't DRY:

def cuisine
    if params[:cuisine].present?
      @recipes = Recipe.all.includes(:cuisines).where(cuisines: { name: params[:cuisine].humanize })
    end
    @message = "There are no recipes matching this cuisine. Please return to" if @recipes.empty?
    @user = current_user
    @count = @recipes.count
  end

  def category
    if params[:category].present?
      @recipes = Recipe.all.includes(:categories).where(categories: { name: params[:category].humanize })
    end
    @message = "There are no recipes matching this category. Please return to" if @recipes.empty?
    @user = current_user
    @count = @recipes.count
  end

I thought I could change the code to this, though that's where it's throwing up the error:

def category
  category_setter(category)
end

def cuisine
  category_setter(cuisine)
end

private

    def category_setter(c)
      @user = current_user
      @count = @recipes.count
      sym = c.to_sym
      syms = c.pluralize.to_sym
      if params[sym].present?
        @recipes = Recipe.all.includes(syms).where(syms: { name: params[sym].to_s.humanize })
      end
      @message = "There are no recipes matching this #{sym}. Please return to" if @recipes.empty?
    end

It's displayed as such in the view:

<div>
      <% @recipes.each do |recipe| %>
        <% if ingredient_matcher(@user, recipe)  %>
          </br><strong><%= recipe.name %></strong>
              <ul>
                <% recipe.ingredients.each do |ing| %>
                  <li><%= ing.name.humanize %></li>
                <% end %>
              </ul>
              <p><%= recipe.method %></p>
        <% else %>
          <% @count -= 1  %>
        <% end %> 
      <% end %>
</div>

Using this helper method:

def ingredient_matcher(one, two)
    (one.fridge.ingredients.pluck(:id) & two.ingredients.pluck(:id)) == two.ingredients.pluck(:id)
  end

Hope that's all the code needed for someone to be able to shed some light on to this - I'm thinking it'll be something pretty straightforward I'm missing!

Thanks in advance, Steve.